Mitsunobu Reaction with 4-(Diphenylphosphino)benzoic Acid: A Separation-Friendly Bifunctional Reagent that Serves as Both a Reductant and a Pronucleophile
摘要:
4-(Diphenylphosphino)benzoic acid was used for the Mitsunobu reaction as a bifunctional reagent that served as both a reductant and a pronucleophile. When combined with di-2-methoxyethyl azodicarboxylate, inversion of a secondary alcohol stereospecifically occurred to give an ester carrying a phosphine oxide group. The reaction mixture was directly hydrolyzed to give an inverted secondary alcohol in sufficient stereo and chemical purities by the presently developed chromatography-free process in conjunction with basic extraction, drying, and concentration.
allowing for the conversion of β,γ-unsaturatedcarboxylicacids into allylic hydrazides via radical regioselective allylic decarboxylative amination is reported. The coexistence of the copper catalyst is essential for the high yield and regioselectivity. A new cooperative organophotoredox/copper catalysis allowing for the conversion of β,γ-unsaturatedcarboxylicacids into allylic hydrazides via radical regioselective
C(sp<sup>3</sup>)–H amination of 8-methylquinolines with azodicarboxylates under Rh(<scp>iii</scp>) catalysis: cytotoxic evaluation of quinolin-8-ylmethanamines
作者:Taejoo Jeong、Neeraj Kumar Mishra、Prasanta Dey、Hyunjung Oh、Sangil Han、Suk Hun Lee、Hyung Sik Kim、Jihye Park、In Su Kim
DOI:10.1039/c7cc06670h
日期:——
The rhodium(III)-catalyzedC(sp3)–H amination reaction of 8-methylquinolines and azodicarboxylates is described. A cationic rhodium catalyst in the presence of lithium acetate and lithium carbonate was found to be an optimal catalytic system for the construction of quinolin-8-ylmethanamine derivatives, which were evaluated for in vitro cytotoxicity against human breast adenocarcinoma cells (MCF-7)
Di-2-methoxyethyl Azodicarboxylate (DMEAD): An Inexpensive and Separation-friendly Alternative Reagent for the Mitsunobu Reaction
作者:Takashi Sugimura、Kazutake Hagiya
DOI:10.1246/cl.2007.566
日期:2007.4.5
Di-2-methoxyethyl azodicarboxylate (DMEAD) was prepared as an alternative of DEAD or DIAD for the Mitsunobureaction. Removal of the hydrazinedicarboxylate generated from DMEAD becomes much easier owing to the polar and water-soluble property.
AZODICARBOXYLIC ACID BIS(2-ALKOXYETHYL) ESTER COMPOUND, AND PRODUCTION INTERMEDIATE THEREOF
申请人:Hagiya Kazutake
公开号:US20100048881A1
公开(公告)日:2010-02-25
Provided is an industrially safe and useful azodicarboxylic acid bis(2-alkoxyethyl) ester compound that is useful for the Mitsunobu reaction in which it is used in combination with a phosphorus compound to carry out a dehydration condensation reaction, and also useful as an oxidizing agent, and a starting material for various synthetic processes. Also provided are a production intermediate of the above-described compound, and methods for producing these compounds. An azodicarboxylic acid bis(2-alkoxyethyl) ester compound represented by formula (1);
wherein A represents an alkyl group having 1 to 10 carbon atoms.