Nonsymmetrical Azocarbonamide Carboxylates as Effective Mitsunobu Reagents
作者:Daniel P. Furkert、Benjamin Breitenbach、Ludovic Juen、Ina Sroka、Mathilde Pantin、Margaret A. Brimble
DOI:10.1002/ejoc.201403152
日期:2014.12
Mitsunobu reagents possessing both dialkyl amide and ester substituents was developed. These new reagents were readily prepared in a single pot from inexpensive, commercially available materials by using a scalable and environmentally friendly procedure. They were shown to exhibit activity parallel to that of diethyl azodicarboxylate/diisopropyl azodicarboxylate in a wide variety of Mitsunobu reactions
A Convenient Preparation of Di-p-chlorobenzyl Azodicarboxylate (DCAD) for Mitsunobu Couplings
作者:Bruce Lipshutz、Benjamin Taft、Elizabeth Swift
DOI:10.1055/s-0028-1083274
日期:2009.1
Gram-scale synthesis of pure, bench-stable solid di-p-chlorobenzyl azodicarboxylate (DCAD) is performed in two steps without resorting to chromatography. This novel reagent effects Mitsunobu couplings with yields comparable to DEAD or DIAD, while addressing several of the drawbacks frequently associated with these common reagents.
无需使用色谱法,只需两步即可合成纯净、稳定的固体偶氮二甲酸对氯苄酯 (DCAD)。这种新型试剂可实现三忍偶联反应,产量可与 DEAD 或 DIAD 相媲美,同时还解决了这些常用试剂经常出现的一些缺点。
The Goldilocks Principle in Phase Labeling. Minimalist and Orthogonal Phase Tagging for Chromatography-Free Mitsunobu Reaction
作者:Mariann Szigeti、Zoltán Dobi、Tibor Soós
DOI:10.1021/acs.joc.8b00014
日期:2018.3.2
An inexpensive and chromatography-free Mitsunobu methodology has been developed using low molecular weight and orthogonally phase-tagged reagents, a tert-butyl-tagged highly apolar phosphine, and a water-soluble DIAD analogue. The byproduct of the Mitsunobureactions can be removed by sequential liquid–liquidextractions using traditional solvents such as hexanes, MeOH, water, and EtOAc. Owing to the
Simplification of the Mitsunobu Reaction. Di-<i>p</i>-chlorobenzyl Azodicarboxylate: A New Azodicarboxylate
作者:Bruce H. Lipshutz、David W. Chung、Brian Rich、Ricardo Corral
DOI:10.1021/ol0618757
日期:2006.10.1
Di-p-chlorobenzyl azodicarboxylate (DCAD) is introduced as a novel, stable, solid alternative to DEAD and DIAD for a variety of Mitsunobu couplings. DCAD/Ph(3)P-mediated reactions in CH(2)Cl(2) generate a readily separable hydrazine byproduct. [reaction: see text]