The Reaction of Organoboranes with Lithium Salts of Trisylhydrazones of Cycloalkanones Followed by Treatment with Iodine
作者:Tsutomu Baba、Kamlakar Avasthi、Akira Suzuki
DOI:10.1246/bcsj.56.1571
日期:1983.5
The titled reaction proceeds smoothly under mild conditions to give corresponding 1-alkylcycloalkenes in excellent yields. The overall reaction provides a convenient synthetic procedure of cycloalkenes for cycloalkanones, with various alkyl substituents readily available by means of hydrobortation.
Hydrazone and Oxime Olefination via Ruthenium Alkylidenes
作者:Daniel J. Nasrallah、Troy E. Zehnder、Jacob R. Ludwig、Daniel C. Steigerwald、John J. Kiernicki、Nathaniel K. Szymczak、Corinna S. Schindler
DOI:10.1002/anie.202112101
日期:2022.5.23
Olefination of carbon–heteroatom double bonds is a powerful approach to access highly functionalized olefins. An approach is reported here that uses air-stable and commercially available rutheniumalkylidenes to promote C=N/olefin ring closure. The enabling strategy for this reaction is the use of hydrazones and oximes as readily accessible substrates that preferentially react with ruthenium alkylidenes