Samarium diiodide induced ring enlargement of azidocyclododecanones to various macrocyclic lactams
作者:Catherine Goulaouic-Dubois、Armin Guggisberg、Manfred Hesse
DOI:10.1016/0040-4020(95)00753-u
日期:1995.10
The synthesis of 2-cyanocyclododecanones 3 a-c alpha-substituted by an azidoalkyl chain is described. Compounds 3a (n=3) and 3b (n=4) were treated with SmI2 to afford in one step, the macrocyclic lactams 4a and 4b via five- and six- membered rings, respectively. For comparison, these lactams were also synthesized from 3a-b by a standard procedure. The synthesis of the 23-membered ring lactam 4c from 3c (n=10) was then attempted by both methods.