[2.31在室温下,在乙腈中由1-乙烯基和1-(1-丙烯基)四氢异喹啉鎓盐3a和3b的N-酰基重排进行重排,得到高产率的官能化3-苯并enza碱衍生物6a(90%:E / Z = 19)和6b(93%:E / Z = 2)。所述Ñ氧化物类似物图4a和图4b给出了2,3- benzoxazepines图8a和8b中。与第一代表4,3-benzoxazonine系统,一起9B,从图4b。
Catalytic <i>N</i>-Sulfonyliminium Ion-Mediated Cyclizations to α-Vinyl-Substituted Isoquinolines and β-Carbolines and Applications in Metathesis
作者:Sape S. Kinderman、Monique M. T. Wekking、Jan H. van Maarseveen、Hans E. Schoemaker、Henk Hiemstra、Floris P. J. T. Rutjes
DOI:10.1021/jo050503t
日期:2005.7.1
vinyl moiety in the resulting products was demonstrated via the synthesis of various key building blocks for alkaloid structures. The α-vinyl moiety was utilized in a [2,3] sigmatropic rearrangement, in ring-closing metathesis and a cross-metathesis-based synthesis of vincantril, an antianoxia agent, and a synthetic member of the vincamine type natural products.
催化Sn(OTf)2诱导的线性,含芳基的烯丙基N,O-乙缩醛的环化反应生成乙烯基取代的四氢异喹啉和四氢-1 H -β-咔啉。乙烯基部分在所得产物中的有用性通过生物碱结构的各种关键结构单元的合成得到证明。α-乙烯基部分用于[2,3]σ重排,闭环置换和基于交叉复分解的长春瑞特,抗缺氧剂和长春胺型天然产物的合成成员的合成。