Organoboranes. 38. A facile and highly efficient addition of B-1-alkynyl-9-borabicyclo[3.3.1]nonanes to aldehydes and ketones: an exceptionally chemoselective synthesis of propargylic alcohols
γ-disubstituted propargylic tosylates was achieved by using metallic barium as the promoter. Various propargylated hydrazines (α-adducts) were exclusively synthesized from the corresponding propargylic tosylates and azobenzenes (diaryldiazenes). The thus-obtained propargylic hydrazines were further efficiently converted into propargylicamines by reductive N–N bond cleavage. Benzidine rearrangement of the propargylic
Catalytic Enantioconvergent Allenylation of Aldehydes with Propargyl Halides
作者:Feng‐Hua Zhang、Xiaochong Guo、Xianrong Zeng、Zhaobin Wang
DOI:10.1002/anie.202117114
日期:2022.3
A Cr-catalyzed enantioconvergent allenylation reaction of aldehydes with racemic propargyl halides has been developed. This robust method employs simple and readily accessible materials, exhibits exceptional functional group tolerance and broad substrate scope, and provides facile access to a wide range of valuable optically enriched α-allenols with two or three continuous chiral centers, including
Compounds of formula I:
or salts thereof are disclosed. Also disclosed are pharmaceutical compositions comprising a compound of formula I, processes for preparing compounds of formula I, intermediates useful for preparing compounds of formula I and therapeutic methods for treating a Retroviridae viral infection including an infection caused by the HIV virus.