Stereochemical issues related to the synthesis and reactivity of pyrazino[2′,1′-5,1]pyrrolo[2,3-b]indole-1,4-diones
作者:Esmeralda Caballero、Carmen Avendaño、J.Carlos Menéndez
DOI:10.1016/s0957-4166(98)00068-8
日期:1998.3
The cyclization of all four diastereoisomers of cyclo-(Trp-Ala) to the corresponding 3,5a,6,10b,11,11a-hexahydro-2H-pyrazino[2',1'-5,1]pyrrolo[2,3-b]indoles is studied from the stereochemical point of view. Epimerization of the tryptophan stereocenter during the cyclization and during acylation reactions of the N-2 atom of the tetracyclic derivatives is discussed. (C) 1998 Elsevier Science Ltd. All rights reserved.