Regioselective Synthesis of Vinyl Halides, Vinyl Sulfones, and Alkynes: A Tandem Intermolecular Nucleophilic and Electrophilic Vinylation of Tosylhydrazones
作者:Devi Prasan Ojha、Kandikere Ramaiah Prabhu
DOI:10.1021/ol503114n
日期:2015.1.2
in tandem at the carbene center to install an electrophile and a nucleophile on the same carbon. This metal-free concept, which is unprecedented, has been illustrated by regioselectivesynthesis of a variety of vinyl halides, vinyl sulfones, and alkyne derivatives.
A One-Pot Generation of α-Chloro-α-Lithio Alkanephosphonates. A New Preparative Route to 1,2-Epoxyalkanephosphonates
作者:Kilsung Lee、Won Suk Shin、Dong Young Oh
DOI:10.1080/00397919208019263
日期:1992.2
Abstract Reaction of lithio anion derived from diethyl alkanephosphonate in the presence of 2 eq. of n-BuLi with benzenesulfonylchloride gives directly the corresponding diethyl-1-chloro-1-lithioalkanephosphonate, which reacts in situ with carbonyl compounds followed by intramolecular substitution reaction to give 1,2-epoxyalkanephosphonates.
<i>vic</i>-Dichlorination of Olefins with Sodium Chlorite, Mn(acac)<sub>3</sub>, and Moist Alumina in Dichloromethane
作者:Shigetaka Yakabe、Masao Hirano、Takashi Morimoto
DOI:10.1080/00397919808007018
日期:1998.5
Abstract Aliphatic, alicyclic, and aromatic alkenes underwent smooth vic-dichlorination upon treatment with a reagent combination of NaClO2, Mn(acac)3 catalyst, and chromatographic neutral alumina preloaded with a small amount of water in dichloromethane under mild conditions.
A remarkable steric effect in palladium-catalyzed Grignard coupling: regio- and stereoselective monoalkylation and -arylation of 1,1-dichloro-1-alkenes
作者:Akio Minato、Keizo Suzuki、Kohei Tamao
DOI:10.1021/ja00238a052
日期:1987.2
concern in transition-metalcomplex catalyzed carbon-carbon bond-forming reactions. As part of their continued studies on the palladium-phosphine complex catalyzed selective monoalkylation of organic polyhalides, they report here the first success in the regio- and stereoselective monoalkylation and -arylation of 1,1-dichloro-1-alkenes by Grignard or organozinc reagents in the presence of (PdCl/sub2/(dppb))
Transition metal free large-scale synthesis of aromatic vinyl chlorides from aromatic vinyl carboxylic acids using bleach
作者:Navnath T. Hatvate、Balaram S. Takale、Shrikant M. Ghodse、Vikas N. Telvekar
DOI:10.1016/j.tetlet.2018.09.034
日期:2018.10
While continuing our research on Hunsdiecker reaction, we came across an interesting application of bleach, sodium hypochlorite (NaOCl) for decarboxylative chlorination reaction. The reaction is easily scaled up to 10 mmol. The reaction has good tolerance towards wide variety of functional groups. The reaction has mild conditions and gave relatively high chemical yield of the desired product.