Methyl 2-silabicyclo[2.1.0]pentane-1-carboxylate, obtained by a photochemical intramolecular cyclopropanation reaction of an α-allylsilyl-α-diazoacetate, undergoes ring opening reactions under different conditions leading to methyl 2-[diisopropyl(methoxy)silylmethyl]cyclopropane-1-carboxylate, a 1-sila-4-cyclopentene-2-carboxylate or an allyl(methoxysilyl)ketene.
![Graphical abstract: Synthesis and ring opening reactions of a 2-silabicyclo[2.1.0]pentane](http://hg.y866.cn/compound/lib/scimg/usr/1/B312110K.jpg)
