Automated Synthesis: Utilization of MEDLEY in Synthetic Processes
作者:Akihiro Orita、Yutaka Yasui、Junzo Otera
DOI:10.1021/op0000475
日期:2000.9.1
A variety of reactions which are commonly used in synthetic chemistry are feasible with the automated synthesizer (MEDLEY). Air-sensitive organolithium and Grignardreagents as well as transition metal catalysts like Ni(0) and Pd(0) species are employable. The precise control of both the reaction temperature and the amount of added reagents enables to examine the dependence of chemical yields on the
α-Silylsulphones have been utilised to prepare vinylsulphones via the Peterson reaction and ketones by alkylation, reduction, and sila-Pummerer rearrangement.
Direct Sulfonylation of Lithiated Alkyl Phosphonates with Benzenesulfonyl Fluoride; Facile Method for Preparation of α-Sulfonyl Alkyl Phosphonates and Vinyl Sulfones
作者:Won Bum Jang、Hyoung Joon Jeon、Dong Young Oh∗
DOI:10.1080/00397919808005967
日期:1998.4
Abstract α-Sulfonyl phosphonates were synthesized by direct sulfonylation of lithiated alkyl phosphonates with benzenesulfonyl fluoride which have shown different reactivity from benzenesulfonyl chloride, generally known as a sulfonylating reagent.
Studies of the Condensation of Sulfones with Ketones and Aldehydes
作者:Michael E. Garst、Lloyd J. Dolby、Shervin Esfandiari、Rachel A. Okrent、Alfred A. Avey
DOI:10.1021/jo051947s
日期:2006.1.1
The condensation of ketones or aldehydes with sulfones was shown to give a variety of products. Condensation of 2-methylcyclohexanone with dimethyl sulfone using potassium t-butoxide as base gave useful yields of 1,2-dimethylenecyclohexane. Under the same conditions, cycloheptanone, 3-methyl-2-butanone, and 2-butanone were converted to dienes. Remarkably, these reaction conditions converted acetophenone
A Single Terminal [NiII−OH] Catalyst for Direct Julia‐Type Olefination and α‐Alkylation Involving Sulfones and Alcohols
作者:Prabhakar K. Pandey、Moumita Patra、Prabodh Ranjan、Nilay Kumar Pal、Sanjay Choudhary、Jitendra K. Bera
DOI:10.1002/chem.202400337
日期:2024.6.20
A single terminal [NiII−OH] catalyst is employed for direct Julia-type olefination of alcohols and α-alkylation of sulfones using different reaction conditions. Detailed mechanistic studies, including DFT calculations, are undertaken to gain insight on the reaction pathway.
使用单末端[Ni II -OH]催化剂,使用不同的反应条件进行醇的直接Julia型烯化和砜的α-烷基化。进行详细的机理研究,包括 DFT 计算,以深入了解反应途径。