α-Oxoketene dithioacetal mediated aromatic annulation: highly efficient and concise synthetic routes to potentially carcinogenic polycyclic aromatic hydrocarbons
作者:Sukumar Nandi、Kausik Panda、J.R Suresh、Hiriyakkanavar Ila、Hiriyakkanavar Junjappa
DOI:10.1016/j.tet.2004.02.053
日期:2004.4
Highly efficient regiospecific routes to potentially carcinogenic polycyclic aromatic hydrocarbons such as substituted benzo[c]phenanthrenes, benzo[c]fluorenes, 16,17-dihydro-11-methyl-15[H]cyclopenta[a]phenanthrene, 5-methyl-7,8,9,10-tetrahydrochrysene and 1,4-dimethylphenanthrene have been developed. The overall strategy involves our aromatic annulation protocol through base induced conjugate addition–elimination
高效的区域特异性途径转化为潜在的致癌多环芳烃,例如取代的苯并[ c ]菲,苯并[ c ]芴,16,17-二氢-11-甲基-15 [ H ]环戊[ a ]菲,5-甲基-7已经开发了8,9,10-四氢丙烯和1,4-二甲基菲。总体策略涉及我们的芳族环化方案,即通过碱诱导的共轭加成反应-在环和无环α-氧杂环丁烯二硫缩醛上用适当的芳基乙腈消除,然后酸诱导所得的共轭加合物进行环脱水。随后环化产物的还原性脱硫甲基化(阮内镍)和脱氢(DDQ)以高收率提供了甲基取代的PAH。