Synthesis of Substituted Naphthalenes by 1,4-Palladium Migration Involved Annulation with Internal Alkynes
作者:Dong Wei、Tian-Jiao Hu、Chen-Guo Feng、Guo-Qiang Lin
DOI:10.1002/cjoc.201800169
日期:2018.8
The palladium catalyzed annulation of 1‐bromo‐2‐vinylbenzene derivatives with internal alkynes was realized for the efficient synthesis of substitutednaphthalenes. A controllable aryl to vinylic 1,4‐palladium migration process is the key for success.
Studies in the cyclopropa-arene series: cyclopropa[b]naphthalenes
作者:Alan R. Browne、Brian Halton
DOI:10.1039/p19770001177
日期:——
7a-tetrahydro-2,7-diphenylcyclopropa[b]naphthalene (5) affords an isolable gem-dihalogenocyclopropa[b]naphthalene (7) on dehydrohalogenation, whereas the tetrabromo-analogue (6) does not. The reaction of the gem-dihalide (7) with a small excess of phenyl- or ethyl-magnesium bromide surprisingly results in halogen exchange and formation of gem-dibromocyclopropa[b]naphthalene (8) in high yield. Only with a
1,1,1a,7a-四氯-1a,2,7,7a-四氢-2,7-二苯基环丙烷[ b ]萘(5 )在脱氢卤代反应中提供可分离的宝石-二卤代杂环丙烷[ b ]萘(7)。四溴类似物(6)没有。所述的反应宝石-dihalide(7)具有小过量苯基-或乙基-溴化镁的令人惊奇地导致在卤素交换和形成宝石-dibromocyclopropa [ b以高收率]萘(8)。只有大量过量的格氏试剂,(7)的卤代取代基才被烷基和芳基取代。而宝石-二乙基衍生物(13)是可分离的,则宝石-二苯基化合物(12)容易断裂,重新排列为苯并[ b ]芴(18)。对于二氯化宝石(7),甲基碘化镁等效于单卤素交换和格利雅还原反应,得到苯并[ c ]芴(20)。
�ber die Kondensation des ?, ??-Diphenyl-?, ??-benzofurans mit unges�ttigten Verbindungen
作者:Richard Weiss、Alfred Abeles
DOI:10.1007/bf01552770
日期:1932.12
Hypervalent Iodine(III)-Mediated Benzannulation of Enamines with Alkynes: an Efficient Synthesis of Substituted Aminonaphthoic Acid Derivatives
作者:Peng Gao、Mingjin Fan、Zijing Bai、Yunyang Wei
DOI:10.1002/cjoc.201400802
日期:2015.4
the synthesis of useful substituted 1‐amino‐2‐naphthoic acid derivatives via benzannulationreactions. Various N‐unsubstituted and N‐alkyl substituted aromatic enamines with terminal alkynes and non‐terminal alkynes can be converted into corresponding 1‐amino‐2‐naphthoic acid derivatives under mild reaction conditions. When meta‐substituted phenyl enamines were employed in the reaction, two cyclization