Von Seebach, Malte; Kozhushkov, Sergei I.; Boese, Roland; Benet-Buchholz, Jordi; Yufit, Dmitrii S.; Howard, Judith A. K.; de Meijere, Armin:
A third-generation bicyclopropylidene: straightforward preparation of 15,15'-bis-(hexaspiro[2.0.2.0.0.0.2.0.2.0.1.0]pentadecylidene) and a C2v-symmetric branched [15]triangulane.
In: Angewandte Chemie, International Edition, Jg. 39 (2000), Heft 14, S. 2495 - 2498
2000Artikel/Aufsatz in ZeitschriftChemie
Titel:
A third-generation bicyclopropylidene: straightforward preparation of 15,15'-bis-(hexaspiro[2.0.2.0.0.0.2.0.2.0.1.0]pentadecylidene) and a C2v-symmetric branched [15]triangulane.
Autor(in):
Von Seebach, Malte; Kozhushkov, Sergei I.; Boese, RolandLSF; Benet-Buchholz, Jordi; Yufit, Dmitrii S.; Howard, Judith A. K.; de Meijere, Armin
Erscheinungsjahr
2000

Abstract:

The synthesis of highly strained branched [15]triangulane I has been achieved by a copper assisted dimerization of 1-bromo-1-lithiocyclopropanes. 7,7-Dibromodispiro[2.0.2.1]heptane (II) underwent successive dimerization, cycloaddn., and dimerization to provide third generation bicyclopropylidene III. III proved resistant to cycloaddn. by dibromocarbenes but with less sterically demanding carbenes, e.g. dichlorocarbene, cycloaddn. occurred to give the corresponding dichlorocyclopropanes which underwent dehalogenation to produce I.