Formation of seven- and eight-membered rings by Mn(III)-based oxidative free-radical cyclization.
作者:Barry B. Snider、John E. Merritt
DOI:10.1016/s0040-4020(01)96189-7
日期:1991.10
Oxidative free-radical cyclizations of acetoacetates 1, 8, 17, and 20 with Mn(OAc)3·2H2 and Cu(OAc)2·H2O in acetic acid provide cycloheptenes and cyclooctenes in moderate to good yield. Tandem cyclizations of 28, 35 and 51 provide bicyclo[4.2.1]nonanes, bicyclo[5.2.1]decanes, bicyclo[5.3.0]decanes and bicyclo[6.3.0]undecanes.
乙酰乙酸酯的氧化自由基环化1,8,17,和20与锰(OAC)3 ·2H 2和Cu(OAc)2 ·H 2 ö在乙酸提供cycloheptenes和环辛烯在中度至良好的产率。的串联环化28,35和51提供双环[4.2.1]壬烷,双环[5.2.1]癸烷,二环[5.3.0]癸烷和双环[6.3.0]十一烷。