Tetrahedron

The preparation and decomposition of alkyl 2-diazopent-4-enoates and 1-trimethylsilyl-1-diazobut-3-enes

MS Baird, HH Hussain

Index: Baird, Mark S.; Hussain, Helmi H. Tetrahedron, 1987 ,  vol. 43,  # 1  p. 215 - 224

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Citation Number: 30

Abstract

The pyrazolines (12),(18),(21),(26) and (32), prepared by addition of diazomethane to alkyl cyclopropene-1-carboxylates or to 1-trimethylsilylcyclopropenes respectively, rearrange at 20 to 70° C to diazo-compounds (14),(19),(23),(28) and (36). Pyrazolines (22) and (33) are unchanged under these conditions. Catalytic decomposition of the diazo-compounds is highly dependent on the nature of the substituents and on the catalyst, leading to ...