Synthesis and demethylation of 4,22-dimethoxy[2.10]metacyclophan-1-yne with BBr3 to afford a novel [10](2,9)-5a,11a-benzofuro-5a-bora-11-bromochromenophane
Synthesis and demethylation of 4,22-dimethoxy[2.10]metacyclophan-1-yne with BBr3 to afford a novel [10](2,9)-5a,11a-benzofuro-5a-bora-11-bromochromenophane
Synthesis and structures of [2.n ]metacyclophan‐1‐enes and their conversion to highly strained [2.n ]metacyclophane‐1‐ynes, in which the triple bonds are distorted from linearity with bond angles of 156.7°–161.4°, are discussed.