Efficient catalytic transition-metal-free conditions for nucleophilic addition of arylacetylenes to aromatic ketones
摘要:
A mild, efficient, and transition-metal-free method for nucleophilic addition of arylacetylenes to diverse aromatic ketones, using catalytic amount of tetrabutylammonium chloride as a promoter and solid KOH as a base in THF, was developed to afford aromatic tertiary propargylic alcohols with high and excellent yields. Aliphatic ketones also gave satisfactory results. (c) 2012 Elsevier Ltd. All rights reserved.
Sulfonylation of Propargyl Alcohols with Sulfinamides for the Synthesis of Allenyl Sulfones
作者:Fei-Fei Zou、Zhen Luo、Yu-Ting Yang、Xin Zhuang、Chuan-Ming Hong、Zheng-Qiang Liu、Wan-Fang Li、Qing-Hua Li、Tang-Lin Liu
DOI:10.1021/acs.joc.2c01495
日期:2022.11.18
A regio- and chemoselective sulfonylation of propargyl alcohols with sulfinamides in 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) was developed. It provided straightforward and mild access to multi-substituted allenyl sulfones by using sulfinamides as the sulfonyl sources. This transformation was promoted by HFIP and did not require any catalysts or oxidants, which allowed for the successful conversion
Highly Enantioselective Phenylacetylene Addition to Aromatic Ketones Catalyzed by Cinchona Alkaloid−Aluminum Complexes
作者:Lei Liu、Rui Wang、Yong-Feng Kang、Chao Chen、Zhao-Qing Xu、Yi-Feng Zhou、Ming Ni、Hua-Qing Cai、Mao-Zhen Gong
DOI:10.1021/jo0483522
日期:2005.2.1
The catalytic asymmetric addition of phenylacetylene to aromatic ketones is reported. The catalyst, generated from commercially available Cinchona alkaloids and industrially available triethylaluminum, gives the expected tertiary alcohols with good enantiomeric excess (70-89%) and yields (60-83%). No previous case has been reported successfully using triethylaluminum as a Lewis acid in the asymmetric alkynylation of carbonylic derivatives, and thus we provide a new method to obtain optically active tertiary propargyl alcohols.