Regioselective Ring-Opening Nucleophilic Addition of Aziridines through Photoredox Catalyst
作者:Hongnan Sun、Chao Yang、Run Lin、Wujiong Xia
DOI:10.1002/adsc.201400476
日期:2014.9.15
A mild and efficient procedure was developed for the regioselective ring‐opening nucleophilic addition reactions of aziridines viavisiblelightphotoredoxcatalysis, that provides a practical synthetic access to 1,2‐bifunctional compounds. Furthermore, the regioselective synthesis of non‐racemic amino ethers from chiral aziridine could also be achieved under mild conditions. Finally, a possible reaction
Use of trichloroacetonitrile as a hydrogen chloride generator for ring-opening reactions of aziridines
作者:Yasunori Toda、Riki Matsuda、Shuto Gomyou、Hiroyuki Suga
DOI:10.1039/c9ob00602h
日期:——
Regioselective ring-opening reactions of 2-aryl-N-tosylaziridines are described, in which hydrogenchloride is generated by photodegradation of trichloroacetonitrile. HCl adducts are obtained in high yields in 1,4-dioxane, whereas methanol adducts are predominantly obtained in methanol. Trichloroacetonitrile can serve as a photoresponsive molecular storage generator for hydrogenchloride.
Visible-light-triggered Catalytic Halohydrin Synthesis from Epoxides and Trichloroacetonitrile by Copper and Iron Salts
作者:Yasunori Toda、Katsumi Tanaka、Riki Matsuda、Hiroyuki Suga
DOI:10.1246/cl.190679
日期:2019.12.5
Preparation of vicinal halohydrins, in which copper or iron chlorides catalyze the ring-opening reaction of epoxides with visible light effectively, is described. The use of trichloroacetonitrile a...
Sulphated zirconia is an efficient catalyst for the regioselective ring-opening of aryl-substituted aziridines. This heterogeneous catalyst can be used several times without loss of activity and is compatible with a variety of acid sensitive and slightly basic nucleophiles.
Studies on ring cleavage of aziridines with hydroxyl compounds
作者:B.A Bhanu Prasad、Rashmi Sanghi、Vinod K Singh
DOI:10.1016/s0040-4020(02)00609-9
日期:2002.9
Ringcleavage of a variety of N-substituted aziridines has been studied with hydroxyl compounds (primary, secondary, allylic and tertiary). It was observed that the cleavage reaction was very facile in the presence of BF3·OEt2 and Sn(OTf)2. Whereas the aziridine opening reaction was facile with primary and secondary alcohols, hindered alcohols took longer (2 days). However, with the help of microwave