Photochemical chlorodecarboxylation via an electron transfer mechanism
作者:Keiji Okada、Kazushige Okamoto、Masaji Oda
DOI:10.1039/c39890001636
日期:——
A new method of chlorodecarboxylation of carboxylic acids via N-acyloxyphthalimides is developed; the reaction proceeds upon irradiation of N-acyloxyphthalimides in the presence of 1,4-diazabicyclo[2.2.2]octane in ButOH–CCl4–H2O (53:42:5 v/v) in moderate to high yields.
提出了一种通过N-酰氧基邻苯二甲酰亚胺对羧酸进行氯脱羧的新方法。当照射在反应进行Ñ -acyloxyphthalimides在1,4-二氮杂双环[2.2.2]辛烷在卜的存在吨OH-CCL 4 -H 2 O(53:42:5 v / v)在中度到高收率。
The invention of new radical chain reactions. Part VIII. Radical chemistry of thiohydroxamic esters; A new method for the generation of carbon radicals from carboxylic acids
作者:Derek H.R. Barton、David Crich、William B. Motherwell
DOI:10.1016/s0040-4020(01)97173-x
日期:1985.1
by tributylstannane in a radicalchainreaction to furnish nor-alkanes.1 In the absence of the stannane a smooth decarboxylatlive rearrangement occurs to give 2-substituted thiopyridines.1 The radicals present in this reaction provoke with -butylthiol an efficient radicalreaction with formation of nor-alkane and 2-pyridyl--butyl disulphide.1Similarly these carbon radicals can be captured by halogen
A method for generation of α-halo carbanions (carbenoids) from aryl α-haloalkyl sulfoxides with alkylmetals
作者:Tsuyoshi Satoh、Koji Takano
DOI:10.1016/0040-4020(95)01078-5
日期:1996.2
Ligand exchange reaction of simple aryl α-haloalkyl sulfoxides with alkyllithium and ethylmagnesium halide at low temperature was investigated. On treatment of aryl α-haloalkyl sulfoxide with n-BuLi, t-BuLi, or EtMgX exclusively sulfur-alkyl bond-cleavage took prace to afford α-halo carbanion (carbenoid). When this reaction was carried out without a proton source, the intermediate α-halo carbanion
Triphosgene–Amine Base Promoted Chlorination of Unactivated Aliphatic Alcohols
作者:Andrés Villalpando、Caitlan E. Ayala、Christopher B. Watson、Rendy Kartika
DOI:10.1021/jo400341n
日期:2013.4.19
Unactivated α-branched primary and secondary aliphatic alcohols have been successfully transformed into their corresponding alkyl chlorides in high yields upon treatment with a mixture of triphosgene and pyridine in dichloromethane at reflux. These mild chlorination conditions are high yielding, stereospecific, and well tolerated by numerous sensitive functionalities. Furthermore, no nuisance waste