期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1981
卷号：78
期号：11
页码：6564-6566
DOI：10.1073/pnas.78.11.6564
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Gas-phase pyrolysis of benzocyclobutenes in a nitrogen stream at 450{degrees}C is a convenient efficient method for preparing dibenzocyclooctadienes. Application of this method to benzo[1,2;4,5]dicyclobutene gives [24](1,2,4,5)cyclophane directly. However, under the same reaction conditions, 3,6-dimethylbenzo[1,2;4,5]dicyclobutene gives the open [2.2]orthocyclophane derivative, whose structure has been established by x-ray crystallographic analysis of the corresponding iron complex.
关键词：Flash pyrolysis ; o -xylylenes ; multibridged cyclophanes
