An Efficient De Novo Synthesis of Partially Reduced Phenanthrenes through C−C Insertion
作者:Ramendra Pratap、Vishnu Ji Ram
DOI:10.1021/jo0711079
日期:2007.9.1
5,6-dihydro-2-oxo-4-sec-amino-2H-benzo[h]chromene-3-carbonitrile by carbanion derived in situ from various ketones in moderate to good yields. 9,10-Dihydrophenanthrenes with and without substituent in the bay region are efficiently and regioselectively synthesized by using propanal and acetyltrimethylsilane as a source of carbanion. Even the synthesis of bisphenanthrenes has been achieved by the ring
一种高效且新颖的合成高度拥挤的3-烷基-,4-烷基-,3-芳基-,3,4-二烷基-,4-烷基-3-芳基-和3,4-二芳基-9的方法,10-二氢-1-仲丁基-aminophenanthrene -2-腈已经通过5,6-二氢-2-氧代-4-碱催化环转化划定仲丁基氨基-2- ħ苯并[ ħ ]苯并吡喃从碳酮中衍生出各种羰基的3-甲腈,产率中等至良好。通过使用丙醛和乙酰基三甲基硅烷作为碳负离子的来源,可以高效地进行区域选择性合成9,10-二氢菲,并在海湾区域内进行取代。甚至bisphenanthrenes的合成已经由5,6-二氢-2-氧代-4-的环转化实现秒2-乙酰基菲以中等收率得到-氨基-2 H-苯并[ h ]亚甲基-3-甲腈。高取代度的3-氨基-1-仲氨基-5,6-二氢菲-2,4-二腈也已经由2-氧代苯并[ h ]色烯与丙二腈的反应制备。