Use of (±)-isopinocampheyldichloroborane for the efficient synthesis of unsymmetrical ketones via stepwise hydroboration of alkenes
作者:Shekhar V. Kulkarni、Ulhas P. Dhokte、Herbert C. Brown
DOI:10.1016/0040-4039(96)00161-x
日期:1996.3
A convenient, one-pot synthesis of unsymmetrical ketones has been developed making use of the in situ reduction — hydroboration reactions of readily prepared and stable (±)-isopinocampheyldichloroborane.
Chiral Synthesis via Organoboranes. 47. Efficient Synthesis of Unsymmetrical Ketones and Enantiomerically Pure Spiroketals Using (±)-Isopinocampheyldichloroborane
作者:Herbert C. Brown、Shekhar V. Kulkarni、Uday S. Racherla、Ulhas P. Dhokte
DOI:10.1021/jo980989w
日期:1998.10.1
intermediate was readily converted into the unsymmetrical ketones, R(1)COR(2), in high yields and purity, by an established method. This methodology was successfully applied to the synthesis of enantiomerically pure spiroketals using optically pure TBS ether protected homoallylic alcohols as the alkenes for stepwise hydroboration.