Treatment of dithioacetals 1a–c, 3, and 4 with DMTSF accomplishes cyclizationupon the indole 3-position to give the Strychnos-type pentacles 2a–c, 10, and 11, respectively.
Studies on the synthesis of pentacyclic strychnos indole alkaloids. photocyclization of n-chloroacetyl-1,2,3,4,5,6-hexahydro-1,5-methanoazocino[4,3-b]indole derivatives
作者:Joan Bosch、Mercedes Amat、Enric Sanfeliu、Miguel Angel Miranda
DOI:10.1016/s0040-4020(01)96651-7
日期:1985.1
give a 1 ,2 ,3 ,4 , 5 ,6-hexahydro-2 ,11-ethano-1 ,5-methanoazocino [4 , 3-6] indole system. Consequently, the method appears to be unsuitable for constructing the pyrrolidine ring of pentacyclicStrychnos indole alkaloids.