作者:Yoshihiko Nakashita、Manfred Hesse
DOI:10.1002/hlca.19830660318
日期:1983.5.5
A general method for enlargement of carbocyclic rings by the so called zip reaction is given. The Michael adducts of 2-nitrocycloalkanones with 3-oxo-4-pentenoates in the presence of tetrabutylammonium fluoride give in high yield compounds with the ring enlarged by four C-atoms. By this method 7-, 8-, and 12-membered cycloalkanones were converted respectively to 11-, 12-, and 16-membered functionalized
给出了通过所谓的拉链反应扩大碳环的一般方法。在氟化四丁基铵存在下,2-硝基环链烷酮与3-氧代-4-戊烯酸酯的迈克尔加成反应可制得高收率的化合物,其环被四个C原子扩大。通过该方法,将7元,8元和12元环烷酮分别转化为11元,12元和16元官能化的碳环(参见方案2和3)。