Reactivity of γ-Hydroxy-α,β-acetylenic Esters with Amines: Facile Synthesis of the Optically Active 4-Amino-2(5<i>H</i>)-furanones
作者:Li-Hong Zhou、Xiao-Qi Yu、Lin Pu
DOI:10.1021/jo802592h
日期:2009.3.6
A convenient synthesis of the optically active 4-amino-2(5H)-furanones is discovered by combining an asymmetric alkyne addition to aldehydes and a subsequent aliphatic amine addition. Both steps can be conducted at room temperature and the products are obtained with high enantioselectivity (84−90% ee). The 4-amino-2(5H)-furanones are also found to undergo very facile electrophilic substitution reactions
Regiospecific Hydration of γ-Hydroxy-α,β-acetylenic Esters: A Novel Asymmetric Synthesis of Tetronic Acids
作者:Amaresh R. Rajaram、Lin Pu
DOI:10.1021/ol060377v
日期:2006.5.1
[reaction: see text] The optically active gamma-hydroxy-alpha,beta-acetylenic esters are obtained from the enantioselective reaction of methyl propiolate with both aliphatic and aromatic aldehydes. These compounds can undergo regiospecific hydration in the presence of Zeise's dimer, [PtCl(2)(C(2)H(4))](2), to generate the optically activetetronicacids.
Highly enantioselective catalytic methyl propiolate addition to both aromatic and aliphatic aldehydes
作者:Jian Huang、Siping Wei、Li Wang、Chun Zhang、Shuangxun Li、Pingxian Liu、Xi Du、Qin Wang
DOI:10.1016/j.tetasy.2016.03.009
日期:2016.6
The excellent catalytic effect on methyl propiolate addition to a wide range of aromatic and aliphatic aldehydes promoted by inexpensive and commercially available BINOL-based ligand is reported. The catalyst systems showed high yields and excellent enantioselectivities for aromatic aldehydes, and excellent yields and high enantioselectivities for aliphatic aldehydes. (C) 2016 Elsevier Ltd. All rights reserved.