2 6-di-tert-butyl-4-methylpyridine

Enantioselective N–alkylation of Indoles via an

05 06 2019This is in contrast with the enantioselective Heck relay reactions developed in our group which are more efficient in high polarity media 8 Replacing Ca(OH) 2 with an organic base 2 6-di-tert-butyl-4-methylpyridine (DTBMP) led to an increase in yield to 59% with an er of 8:92 (entry 2)

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2 6

2 6-di-tert-butyl-4-methylpyridine Regulatory process names 1 Other identifiers 1 Service a division of the American Chemical Society to substances registered in the CAS registry database A substance identified primarily by an EC or list number may be linked with more than one CAS number or with CAS numbers that have been deleted

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Optimization of Reagents and Conditions in Protective

A solution of 2 6-di-tert-butyl-4-methylpyridine (0 0513g 0 25mmol) and 5-(p-methoxybenzylthio)-1-phenyl-1H-tetrazole (0 0955g 0 32mmol) in 1 ml of anhydrous solvent (2ml) was transferred into a 1ml ice cooled solution mixture of cyclohexanol (0 0200g 0 2mmol) and silver triflate (0 0822g 0 32mmol)

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Cannabis Chemistry Archives

The conditions that they report (dichloromethane as solvent -78 degree C temperature BCl3 as a Lewis acid 2 6-di-tert-butyl-4-methylpyridine as a bulky more selective base) might not be directly scalable especially for those with limited experience in synthetic chemistry Semisynthesis

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Organic Syntheses Coll Vol 6 p 353 (1988) Vol 59 p

iodide is reduced by the presence of pyridine Hindered pyridine bases such as 2 6-di-tert-butyl-4-methylpyridine5 have also been used for this purpose by the submitters The pyridine bases do not appear to react with iodotrimethylsilane 10

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Synthesis of benzofurans via an acid catalysed

f 1a and 2a were also recovered g In the presence of 2 6-di-tert-butyl-4-methylpyridine (1 equiv ) Table 2 Substrate scopea b a A 5 mL glass vial was filled with 2 (0 2 mmol) 3 (0 22 mmol) and DCE (1 mL) TMSOTf (0 02 mmol) was then introduced at 0–5 1C After stirring at the same temperature for 30 min the reaction continued at

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Synthesis of Glycolipids

Abstract Glycolipids composed of hydrophilic carbohydrate and hydrophobic aliphatic residues have a wide variety of biological activity Natural glycolipids are known to be very complex and heterogeneous and sometimes contain lipophilic contaminants which cause confusion in the understanding of their original functions in biological process

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Teoc 2-(trimethylsilyl)ethoxycarbonyl O O Si O TEP triethylphosphite P O O TES triethylsilyl Si F O S O Tf trifluoromethanesulfonyl F F F OH O TFA trifluoroacetic acid F F F NH 2 O Tfa trifluoroacetamide F F xli TABLE OF CONTENTS SEARCH TEXT Abbreviation TFAA Chemical Name trifluoroacetic anhydride Chemical Structure O F F O F F O F F TFE 2 2 2

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General One‐Pot Reductive gem‐Bis‐Alkylation of Tertiary

16 08 2013The method is based on in situ activation of amide with triflic anhydride/2 6‐di‐tert ‐butyl‐4‐methylpyridine (DTBMP) followed by successive addition of two organometallic reagents of the same or different kinds to form two C C bonds Both alkyl and functionalized organometallic reagents and enolates can be used as the nucleophiles

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Electronic Supplementary Information

Tandem reaction of 2-nitrobenzenediazonium tetrafluoroborate: A flame-dried two-necked flask equipped with gas inlet/outlet and rubber septum was evacuated and backfilled with argon (the cycle was performed twice) and then charged under a positive pressure of argon with 2 6-di-tert-butyl-4-methylpyridine (615 mg 3 mmol) dry

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J Vol 42 No 23 1977 3761

2-Octanol Methyl 2-octyl ether lg (0 216 g 1 5 mmol) was placed in an NMR tube and -0 2 mL of propene was condensed into the tube at -78 C To this at -78 C was added the supernatant liquid from the centrifugation of 1 0 mL CD3CN and 0 65 mL (5 0 mmol) of tri- methylsilyl iodide (all transfers performed with clean dried syringes)

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Story of Eribulin Mesylate: Development of the Longest

23 03 2016Abstract Eribulin mesylate (Halaven™) approved in 2010 as an anticancer agent represents a simplified analogue of the marine natural product halichondrin B which was isolated in 1986 from the sea sponge Halichondria okadai The story of the discovery development and launch of this drug impressively demonstrates how far the limits of total synthesis of natural products have been

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4

Find link is a tool written by Edward Betts searching for 4-Methylpyridine 7 found (17 total) 2 6-Di-tert-butylpyridine (235 words) case mismatch in snippet view article find links to article described including 2 4 6-tri-t-butylpyridine and 2 6-di-tert-butyl-4-methylpyridine Rafael R Kostikov Snchez-Sancho Francisco Mara Garranzo and M

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2 6

General description 2 6-Di-tert-butyl-4-methylpyridine is a sterically hindered non-nucleophilic base which distinguishes between Brnsted (protonic) and Lewis acids It also enables the direct high-yield conversion of aldehydes and ketones to vinyl triflates It inhibits desilylation and hydration of the products during GaCl 3-catalyzed ortho-ethynylation of phenol

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Synthesis of Glycolipids

Abstract Glycolipids composed of hydrophilic carbohydrate and hydrophobic aliphatic residues have a wide variety of biological activity Natural glycolipids are known to be very complex and heterogeneous and sometimes contain lipophilic contaminants which cause confusion in the understanding of their original functions in biological process

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Diastereoselective Michael Claisen Cyclizations of γ Oxa

of 2 6-di-tert-butyl-4-methylpyridine for 23)(Scheme 5) Enol triflate 24 was reduced directly without purification using borane−dimethylamine complex13 (5 00 equiv) in the presence of palladium acetate (0 80 equiv) to afford 5-oxa-AB enone 4 (23% yield from hemiacetal 22 and 21% yield from enol 23)

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Matthew Kennedy

A range of enantiopure 1 2 3 4-tetrahydroisoquinolines have been prepared directly from α-hydroxy-β-amino esters Activation of the α-hydroxy group upon treatment with Tf2O and 2 6-di-tert-butyl-4-methylpyridine promotes aziridinium formation which is then followed by rupture of the C(3)–N bond and Friedel–Crafts alkylation-type cyclisation of an N-benzyl moiety onto the resultant

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Teoc 2-(trimethylsilyl)ethoxycarbonyl O O Si O TEP triethylphosphite P O O TES triethylsilyl Si F O S O Tf trifluoromethanesulfonyl F F F OH O TFA trifluoroacetic acid F F F NH 2 O Tfa trifluoroacetamide F F xli TABLE OF CONTENTS SEARCH TEXT Abbreviation TFAA Chemical Name trifluoroacetic anhydride Chemical Structure O F F O F F O F F TFE 2 2 2

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Story of Eribulin Mesylate: Development of the Longest

23 03 2016Abstract Eribulin mesylate (Halaven™) approved in 2010 as an anticancer agent represents a simplified analogue of the marine natural product halichondrin B which was isolated in 1986 from the sea sponge Halichondria okadai The story of the discovery development and launch of this drug impressively demonstrates how far the limits of total synthesis of natural products have been

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Supporting Information

dried immediately before use 2 6-Di-tert-butyl-4-methylpyridine (DTBMP) and trifluoromethanesulfonic anhydride (Tf2O) were purchased from Acros Bis(trifluoroacetoxy)iodobenzene (PIFA) 3-chloroperoxybenzoic acid (m-CPBA) and all other commercially available chemicals were purchased from Adamas and used without further purification

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Sonogashira coupling

The palladium cycle An inactive palladium Pd II catalyst is activated by a reduction to the Pd 0 compound The active palladium catalyst is the 14 electron compound Pd 0 L 2 complex A which reacts with the aryl or vinyl halide in an oxidative addition to produce a Pd II intermediate complex B This step is believed to be the rate-limiting step of the reaction

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2 6

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High quality 2 6

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