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A study of the scope and regioselectivity of the ruthenium-catalyzed [3 + 2]-cycloaddition of azides with internal alkynes.
[3 + 2]-Cycloadditions of alkyl azides with various unsymmetrical internal alkynes in the presence of CpRuCl(PPh3)2 as catalyst in refluxing benzene have been examined, leading to… Expand
Efficient methodology for alkylation of vinylnitroso compounds with carbon nucleophiles.
- Puhui Li, M. M. Majireck, Jason A. Witek, S. Weinreb
- Chemistry, Medicine
- Tetrahedron letters
- 14 April 2010
A diverse array of nitrosoalkenes derived from both acyclic and cyclic ketones, as well as aldehydes, via the Denmark protocol using alpha-chloro-O-TBS-oximes can be trapped efficiently in situ by a… Expand
Total syntheses of the monoterpene indole alkaloids (±)-alstilobanine A and E and (±)-angustilodine.
- Y. Feng, M. M. Majireck, S. Weinreb
- Chemistry, Medicine
- The Journal of organic chemistry
- 3 January 2014
A synthetic strategy has been developed culminating in stereoselective total syntheses of the small class of unusual monoterpenoid indole alkaloids exemplified by alstilobanines A (3) and E (2) and… Expand
Total synthesis of the unusual monoterpenoid indole alkaloid (±)-alstilobanine A.
The monoterpene indole alkaloids, which are usually comprised of a tryptamine moiety appended to a single C9- or C10-terpenoid unit, constitute one of the largest known classes of natural… Expand
REGIOSELECTIVE α-MONOCHLORINATION OF N-PROTECTED-3-PIPERIDONES (Dedicated to Dr. Albert Padwa on his 75th birthday)
An expedient reductive method for conversion of ketoximes to the corresponding carbonyl compounds.
A wide array of readily prepared pivalates of ketoximes can be converted to the corresponding ketones in good yields by treatment with iron powder in THF containing catalytic amounts of both… Expand
A mild, efficient method for the oxidation of α-diazo-β-hydroxyesters to α-diazo-β-ketoesters
Abstract A wide variety of α-diazo-β-ketoesters can be prepared in good overall yields via a two-step sequence involving addition of ethyl lithiodiazoacetate to aliphatic, aromatic, and conjugated… Expand
Synthesis of phthalan and phenethylamine derivatives via addition of alcohols to rhodium(II)-azavinyl carbenoids
Abstract 1-Sulfonyl-1,2,3-triazoles undergo inter- and intramolecular 1,3-OH insertion with rhodium(II)-azavinyl carbenoid intermediates upon treatment with a rhodium(II) catalyst. Products of this… Expand
A Mild, Efficient Method for the Oxidation of α‐Diazo‐β‐hydroxyesters to α‐Diazo‐β‐ketoesters.