Regioselective Preparation of Saturated Spirocyclic and Ring-Expanded Fused Pyrazoles
作者:Rohan R. Merchant、Daniel M. Allwood、David C. Blakemore、Steven V. Ley
DOI:10.1021/jo501624t
日期:2014.9.19
tosylhydrazones, which are easily prepared from their parent ketones. Sigmatropic rearrangement of spirocyclic pyrazoles to fused analogues occurs with concomitant one-carbon expansion of the saturated ring, allowing rapidaccess to a range of pharmaceutically and agrochemically relevant polycyclic structures featuring a broad scope of saturated ring sizes.