Diels-alder reactions of pyrano[3,4-b]indol-3-ones with substituted alkenes : synthesis of 1,2-dihydrocarbazoles - part II
作者:P. Van Doren、F. Compernolle、G. Hoornaert
DOI:10.1016/s0040-4020(01)90537-x
日期:1990.1
The Diels-Alder reaction of pyrano[3,4-b]indol-3-ones 1 with trisubstituted dienophiles 2 yields stable 1,2-dihydrocarbazoles 4. Electronic and steric factors, together with a gradual change in mechanism from a concerted to a more stepwise reaction, are invoked to explain the regiochemical distribution of products.
吡喃并[3,4-b]吲哚-3-酮1与三取代的亲二烯体2的Diels-Alder反应产生稳定的1,2-二氢咔唑4。电子和位阻因素,以及从协同反应到逐步反应的机理上的逐渐变化,被用来解释产物的区域化学分布。