A diastereoselective phenylselenium-induced lactamization of olefinic amides. A possible route to α-and β-amino acid derivatives
作者:Sung-Kee Chung、Tae-Heum Jeong、Dong-Ho Kang
DOI:10.1016/s0957-4166(96)00496-x
日期:1997.1
The organoselenium-induced cyclofunctionalization of (S)-N-(alpha,beta-unsaturated-acyl)prolinamides was found to produce with a high degree of chirality transfer, 7- and 6-membered bislactam derivatives depending on the substitution pattern of the starting material. (C) 1997 Published by Elsevier Science Ltd.
Novel asymmetric phenylselenium-induced lactamizations of olefinic amides: stereoselective routes to α- and β-amino acids
作者:Sung-Kee Chung、Tae-Heum Jeong、Dong-Ho Kang
DOI:10.1039/a705390h
日期:——
Organoselenium-induced cyclofunctionalization of the (S)-N-(α,β-unsaturated) acylprolinamides 1, 7 and 14 has been found to produce the 7-membered bislactam products 2 and 15, or the 6-membered phenylselenolactam products 8 and 9 depending on the substitution pattern of the enone moiety of the starting material. The structural identities and stereochemistry of the cyclized products have been determined by X-ray diffraction, and the diastereoselectivity in the formation of the 7-membered ring bislactam product was found to be 91.6% de. The mechanism of the cyclolactamization is discussed.