作者:Merritt B. Andrus、Michael A. Christiansen、Erik J. Hicken、Morgan J. Gainer、D. Karl Bedke、Kaid C. Harper、Shawn R. Mikkelson、Daniel S. Dodson、David T. Harris
DOI:10.1021/ol702197r
日期:2007.11.1
2-Acylimidazoles are alkylated under phase-transfer conditions with cinchonidinium catalysts at -40 degrees C with allyl and benzyl electrophiles in high yield with excellent enantioselectivity (79 to >99% ee). The acylimidazole substrates are made in three steps from bromoacetic acid via the N-acylmorpholine adduct. The catalyst is made in high purity allowing for S-product formation (6-20 h) under