A New Lithium Alkoxide Accelerated Diastereoselective Cyanation of Ketones
作者:H. Scott Wilkinson、Paul T. Grover、Charles P. Vandenbossche、Roger P. Bakale、Nandkumar N. Bhongle、Stephen A. Wald、Chris H. Senanayake
DOI:10.1021/ol0069608
日期:2001.2.1
lithium heteroatom assisted TMSCN or TBSCN addition to aldehydes and ketones has been discovered. The process provides excellent selectivities and high rates. Conformationally constrained ketones such as camphor, fenchone, and nopinone give excellent diastereoselectivities with TMSCN. Reduction of 2 provided diastereopure amino alcohol 3 in good yield. alpha- and beta-Methyl cyclohexanones with TBSCN-LiOR