Synthesis of Unsymmetrically Substituted 1,3-Butadiynes and 1,3,5-Hexatriynes via Alkylidene Carbenoid Rearrangements
作者:Annabelle L. K. Shi Shun、Erin T. Chernick、Sara Eisler、Rik R. Tykwinski
DOI:10.1021/jo026481h
日期:2003.2.1
Unsymmetrically substituted 1,3-butadiynes and 1,3,5-hexatriynes are synthesized in four steps from commercially available aldehydes or carboxylic acids. The key step in this process involves a Fritsch-Buttenberg-Wiechell rearrangement, in which an alkylidene carbenoid intermediate subsequently rearranges to the desired polyyne. This rearrangement proceeds under mild conditions, and it is tolerant
Spontaneous rearrangement of heteroaromatic alkynols into enones involves an autocatalytic mechanism.
杂芳族炔醇自发重排成烯酮涉及一种自催化机制。
Facile conversion of pyridine propargylic alcohols to enones: stereochemistry of protonation of allenol
作者:Ramazan Erenler、Jean-François Biellmann
DOI:10.1016/j.tetlet.2005.06.087
日期:2005.8
The conversion of 4-pyridyl propargylic alcohols 1 to the (E)-propenones 3 and propynones 2 occurs under mild reaction conditions, pyridinium chloride in methanol at room temperature. (Z)-4-Pyridyl propenones 11 are detected as initial products when large substituents such as trimethylsilyl, tert-butyl and phenyl are attached at C-3 of the propynols and these (Z)-enones 11 are isomerised to the (E)-isomers
The present invention relates to novel retinoid-related orphan receptor gamma (RORγ) modulators and their use in the treatment of diseases mediated by RORγ.