摘要:
The trialkynylarsine oxide (Me3CC = C)3AsO reacts with 2 equiv of [trans-Pt(H)(PEt3)2(THF)][SbF6], and subsequently with pyridine, to give a spirocyclic arsenic compound in which the arsenic atom participates in two four-membered rings. One ring is an arsacyclobutene that bears an alkylidene substituent at the 2-position.