METHOD FOR THE PREPARATION OF alpha-SUBSTITUTED ACRYL ALDEHYDES
申请人:Council of Scientific and Industrial Research
公开号:US20160083409A1
公开(公告)日:2016-03-24
The invention discloses simple and rapid method for the preparation of α-substituted acryl aldehydes. More particularly, the invention discloses a method for the preparation of α-substituted acryl aldehydes via a gold-catalysed [1,3] rearrangement of the allenyl ethers with a record turnover frequency of 4600 h
−1
at 0.05 mol % of the catalyst concentration in homogeneous gold(I) catalysis. The α-substituted acryl aldehydes synthesized by the instant process are used as building blocks in organic synthesis.
Enantioselective activation of ethers by chiral organoaluminum reagents: Application to asymmetric Claisen rearrangement
作者:Keiji Maruoka、Hiroshi Banno、Hisashi Yamamoto
DOI:10.1016/s0957-4166(00)86119-4
日期:1991.1
asymmetric Claisenrearrangement of allylvinylethers has been effected with a chiral organoaluminumreagent, (R)-1 or (S)-1 as an example of the enantioselective activation of ether substrates. This method provides a facile asymmetric synthesis of various acylsilanes and acylgermanes with high optical purity. Among various trialkylsilyl substituents of chiral organoaluminumreagent 1, use of the more