6-endo,6-endo,6-exo Cascade cyclization starting from vinyl radical; construction of a dodecahydrophenanthrene system
作者:Kiyosei Takasu、Jun-ichi Kuroyanagi、Akira Katsumata、Masataka Ihara
DOI:10.1016/s0040-4039(99)01234-4
日期:1999.8
Treatment of 1-iodo-1,5-diene 3 with Bu3SnH at 80 degrees C afforded the 6-endo cyclized product 6. The reaction was extended further to achieve the transformation of 1-iodo-1,5,9,14-tetraene 10 into dodecahydrophenanthrene 11 under one electron reductive conditions via 6-endo,6-endo,6-exo cascade cyclization. (C) 1999 Elsevier Science Ltd. All rights reserved.