Silicon-Directed Oxa-Pictet−Spengler Cyclization and an Unusual Dimerization of 2-Trimethylsilanyl Tryptophols
作者:Xuqing Zhang、Xiaojie Li、James C. Lanter、Zhihua Sui
DOI:10.1021/ol050623n
日期:2005.5.1
The tetrahydro-pyrano[3,4-b]indoles 6 were synthesized from 2-(2-trimethylsilanyl-1H-indol-3-yl)-ethanols 5 and various ketones or aldehydes through silicon-directed oxa-Pictet-Spengler cyclizations. An unusual reaction led to the dimeric products 7 when some of 5 was treated with acetone using BF(3) as the catalyst.
由2-(2-三甲基硅烷基-1H-吲哚-3-基)-乙醇5和各种酮或醛通过硅定向的oxa-Pictet-Spengler环化反应合成四氢吡喃并[3,4-b]吲哚6。当使用BF(3)作为催化剂用丙酮处理5个化合物中的一些时,一个不寻常的反应导致生成二聚产物7。