Photolysis of diazocyclopentadiene : Reactivity of cyclopentadienylidene in sulfides and ethers |
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Authors: | W. Ando Y. Saiki T. Migita |
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Affiliation: | Department of Chemistry, Gunma University, Kiryu, Gunma, Japan |
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Abstract: | Photolysis of diazocyclopentadiene in the presence of dimethyl, diethyl and tetramethylene sulfides gave the corresponding sulfonium cyclopentadienylide. But the ylides from diisopropyl and di-t-butyl sulfides were unstable, and the reaction mixture gave the CH and CS insertion products of cyclopentadienylidene and olefin elimination products. Reaction of diazocyclopentadiene in ethers gave the CH insertion and some CO insertion products. For diethyl ether, the insertion ratio into secondary and primary CH bonds was 19:1. For tetrahydrofuran, both α and β-CH insertion products were observed in ratio of 3:0. Photolysis of diazocyclopentadiene in allylic ethers gave the addition product of the carbene to the double bond, but in allylic sulfides gave both CS insertion and addition products of the carbene. |
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