The Reaction of Halogeno-Substituted N,N-Dimethylanalines and Polycyclic Aromatic Hydrocarbons with Certain Arylacetonitriles or α-Cyano-o-tolunitrile Under Aryne-Forming Conditions
作者:Wei Han、Yingchun Lu、He Zhao、Mahesh Dutt、Edward R. Biehl
DOI:10.1055/s-1996-4178
日期:1996.1
The scope of the tandem addition-rearrangement aryne reaction has been extended to include 2-bromo-4-methyl-N,N-dimethylaniline (1) and 6-bromo-5-methoxyindan (4). These haloarenes react with arylacetonitriles 2 under lithium diisopropylamide mediated aryne-forming conditions to give primarily 2-arylmethyl-3-methyl-6-N,N-dimethylaminobenzonitriles 3 and 4-arylmethyl-6-methoxyindan-5-carbonitriles 5, respectively. 9-Bromophenanthrene (14), and 4-bromopyrene (16) react with α-cyano-o-tolunitrile (8) to give mainly rearranged products 2-(2’-cyanobenzyl)-3-methyl-6-N,N-dimethylaminobenzonitrile (9), 10-(2’-cyanobenzyl)phenanthrene-9-carbonitrile (15), and 5-(2’-cyanobenzyl)pyrene-4-carbonitrile (17). However, compound 8 reacts with 3-chloro-N,N-dimethylaniline (10), 4-bromopyrene (16) and 6-bromo-5-[(4-tolylsulfonyl)-oxy]indan (6) to give 4+2 cycloaddition products 10-amino-1-N,N-dimethylaminoanthracene-9-carbonitrile (11), 6-amino-5-methoxy-2,3-dihydro-1H-cyclopent(a)anthracene-11-carbonitrile (12), and 10-amino-2,3-dihydro-1H-cyclopent(b)-anthracene-5-carbonitrile (13), respectively. The reaction of indan 6 with arylacetonitriles 2 and butyllithium affords no arynic products, but rather yields α-(4-tolylsulfonyl)arylacetonitriles 7. These results are discussed in terms of electronic effects.
串联加成-重排芳炔反应的范围已扩展至包括2-溴-4-甲基-N,N-二甲基苯胺(1)和6-溴-5-甲氧基茚(4)。这些卤代芳烃在锂二异丙胺介导的芳炔生成条件下与芳基乙腈(2)反应,主要生成2-芳基甲基-3-甲基-6-N,N-二甲基氨基苯腈(3)和4-芳基甲基-6-甲氧基茚-5-腈(5)。9-溴菲(14)和4-溴芘(16)与α-氰基-o-甲苯腈(8)反应,主要生成重排产物2-(2'-氰基苄基)-3-甲基-6-N,N-二甲氨基苯腈(9)、10-(2'-氰基苄基)菲-9-腈(15)和5-(2'-氰基苄基)芘-4-腈(17)。然而,化合物8与3-氯-N,N-二甲基苯胺(10)、4-溴芘(16)和6-溴-5-[(4-甲苯磺酰)-氧]茚(6)反应,生成4+2环加成产物10-氨基-1-N,N-二甲基氨基蒽-9-腈(11)、6-氨基-5-甲氧基-2,3-二氢-1H-环戊蒽-11-腈(12)和10-氨基-2,3-二氢-1H-环戊(b)-蒽-5-腈(13)。茚(6)与芳基乙腈(2)及丁基锂的反应未生成芳炔产物,而是生成α-(4-甲苯磺酰)芳基乙腈(7)。这些结果从电子效应的角度进行讨论。