作者:Joseph J. Tufariello、Harold Meckler、K.Pushpananda A. Senaratne
DOI:10.1016/s0040-4020(01)96699-2
日期:1985.1
The synthesis of anatoxin-a (1) was completed by using the cycloaddition of 1-pyrroline 1-oxide (2) onto dienol (6), a reaction which proceeded with high stereoselectivity, regioselectivity, and site selectivity. The resultant adduct (i.e. 7) was oxidized to a second nitrone (i.e. 8) which undergoes a second closure to afford cycloadduct 9a with regiospecificity. The conversion of 9a into anatoxin-a
Anatoxin-a(1)的合成是通过将1-pyrroline 1-oxide(2)环加成到二烯醇(6)上来完成的,该反应以高立体选择性,区域选择性和位点选择性进行。将所得的加合物(即7)氧化为第二硝酮(即8),将其进行第二次封闭以提供具有区域特异性的环加合物9a。将9a转化为盐酸Anatoxin-a(1 ·HCl)既直接又有效。