Synthesis of Dihydropyrano[3,2-c]pyrazoles via Double Bond Migration and Ring-Closing Metathesis

Synthesis of Dihydropyrano[3,2-c]pyrazoles via Double Bond Migration and Ring-Closing Metathesis

Three types of pyrazole-fused heterobicycles, i.e., 1,5-, 1,7-, and 2,5-dihydropyrano[3,2-c]pyrazoles, were synthesized from 4-allyloxy-1H-pyrazoles. A sequence of the Claisen rearrangement of 4-allyloxy-1H-pyrazoles, ruthenium-hydride-catalyzed double bond migration, O-allylation, and ring-closing...

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Bibliographic Details
Main Authors: Yoshihide Usami, Kodai Sumimoto, Azusa Kishima, Yuya Tatsui, Hiroki Yoneyama, Shinya Harusawa
Format: Article
Language:English
Published: MDPI AG 2019-01-01
Series:Molecules
Subjects:
dihydropyrano[3,2-c]pyrazole
synthesis
double bond migration
ruthenium hydride catalyst
ring-closing metathesis
Online Access:http://www.mdpi.com/1420-3049/24/2/296

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