Computational and experimental structure–reactivity relationships: evidence for a side reaction in Alpine-Borane reductions of d-benzaldehydes
作者:Hui Zhu、N. Soledad Reyes、Matthew P. Meyer
DOI:10.1016/j.tetlet.2009.09.109
日期:2009.12
borabicyclo[3.3.1]nonane (Alpine-Borane). This is likely because of the extreme size disparity of groups on either side of the carbonyl. Here, we present a structure-reactivity study whereby the reductions of variably substituted d-benzaldehydes are explored using highly sensitive measures for enantiomeric excess and relative reactivity. These results are compared to the relativerates predicted from
A new redox system: Trichloromethylarene — pyridine base. On the mechanism of the synthesis of N-(4-pyridyl)pyridinium dichloride
作者:Leonid I. Belen'kii、Igor S. Poddubnyi、Mikhail M. Krayushkin
DOI:10.1016/0040-4039(95)00943-7
日期:1995.7
A redox reaction of trichloromethylarenes with pyridines results in respective N-(α-chloroarylmethyl)-substituted pyridinium chlorides which give on hydrolysis aromatic aldehydes and 4-chloropyridines or 1,4′-bipyridinium salts.
GENERAL METHOD FOR INCREASING STEREOSELECTIVITY IN STEREOSELECTIVE REACTIONS
申请人:Meyer Matthew P.
公开号:US20090163741A1
公开(公告)日:2009-06-25
This invention is directed to a method of performing a stereoselective reaction without use of a solvent comprising contacting a reactant with a chiral reagent under sonication conditions to form an excess of an enantiomer.
Visible-Light Photoredox-Catalyzed Decarboxylation of α-Oxo Carboxylic Acids to C1-Deuterated Aldehydes and Aldehydes
作者:Chun-Hong Hu、Yang Li
DOI:10.1021/acs.joc.2c02299
日期:——
deuterated lead compounds for deuterium-labeled drug discovery. Herein, we develop a metal-free synthesis of C1-deuterated aldehydes with D2O from α-oxo carboxylicacids at ambient temperature. Via visible-light photoredox-catalyzed decarboxylation, stoichiometric reductants and oxidants were avoided. Various functional groups were tolerated and resulted in C1-deuterium aldehydes in up to 92% yield
高附加值的 C1-氘代醛的合成将提高用于氘标记药物发现的氘化先导化合物的可用性。在此,我们开发了一种在环境温度下从 α-氧代羧酸中用 D 2 O无金属合成 C1-氘代醛的方法。通过可见光光氧化还原催化脱羧,避免了化学计量的还原剂和氧化剂。可以耐受各种官能团,并在温和条件下以高达 92% 的产率和 91-97% 的 D 掺入率产生 C1-氘醛。该方法也适用于各种醛的合成。主要机理研究表明,催化途径通过还原猝灭途径发生,然后是氢原子转移。
Nature of the reducing agent and mechanism of the reductive condensation of trichloromethylarenes with hydroxylamine and hydrazines in pyridine
作者:L. I. Belen'kii、I. S. Poddubnyi、M. M. Krayushin