Type 2 Intramolecular <i>N</i>-Acylnitroso Diels−Alder Reaction: Scope and Application to the Synthesis of Medium Ring Lactams
作者:Steven M. Sparks、Chun P. Chow、Liang Zhu、Kenneth J. Shea
DOI:10.1021/jo049897z
日期:2004.4.1
Heteroatom variants of the type 2 intramolecular Diels−Alder reaction provide an efficient method for the preparation of bridged bicyclic heterocycles. The type 2 variant of the intramolecular N-acylnitroso Diels−Alder reaction is an effective method for the synthesis of bridged bicyclic oxazinolactams. Structural studies of the cycloadducts have allowed for quantification of the deformations of the
2型分子内Diels-Alder反应的杂原子变体为制备桥接的双环杂环提供了一种有效的方法。分子内N-酰基亚硝基Diels-Alder反应的2型变异体是合成桥联双环恶嗪内酰胺的有效方法。环加合物的结构研究已经可以量化桥头官能团的变形,并为取代的七元和八元环内酰胺的立体选择性合成提供了一种策略。非对映选择性环加成反应,然后裂解恶嗪环,得到氮杂环庚烷-2-酮或偶氮素-2-酮。