It was found that photopromoted carbonylation of olefins and CO 2 under ambient conditions could be catalyzed by Co(OAc) 2, Co(acac) 2, CoSalen, Cobalt picolinic ester and[Co(14)-4,11-diene-N 4]I 2[5,7,7,12,14,14-hexa...It was found that photopromoted carbonylation of olefins and CO 2 under ambient conditions could be catalyzed by Co(OAc) 2, Co(acac) 2, CoSalen, Cobalt picolinic ester and[Co(14)-4,11-diene-N 4]I 2[5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-dieneatocobalt(Ⅱ)]. The carbonylation of cyclohexene gave some by-products of cyclo-C 6H 11-CH 2OH, cyclo-C 6H 11-CHO and cyclo-C 6H 11-COCH 3, which were established by labelling studies with 13CO 2, 13CH 3OH, CD 3OD and CD 3COCD 3. CH 3(CH 2) 7-CH 2OH, CH 3(CH 2) 7-CHO and CH 3(CH 2) 7-COCH 3 were also confirmed as the by-products of carbonylation of 1-octene.展开更多
Photopromoted carbonylation of bromohydrocarbon catalyzed by cobalt complexes can be carried out under ambient conditions in CH3OH/DMF.It is found that DMF can be decomposed into CO under irradiation and thus can be u...Photopromoted carbonylation of bromohydrocarbon catalyzed by cobalt complexes can be carried out under ambient conditions in CH3OH/DMF.It is found that DMF can be decomposed into CO under irradiation and thus can be used as a CO source for the photopromoted carbonylationof bromohydrocarbon,which has been proved by isotope experiment of H13CON（CH3）2.In this paper,the effect of different cobalt catalysts on photopromoted carbonylation of bromohydrocarbon is studied and the way which photopromoted carbonylation of bromohydrocarbon proceed through is deduced.展开更多
A novel carbonyl transposition reaction led by aromatic amines nucleophilic addition to \{2 oxo glycoside\} was discovered. The mechanism of the reaction was provided through tracing the change of 1H NMR of a hemiacet...A novel carbonyl transposition reaction led by aromatic amines nucleophilic addition to \{2 oxo glycoside\} was discovered. The mechanism of the reaction was provided through tracing the change of 1H NMR of a hemiacetal intermediate which was obtained in the reaction of o phenylene diamine with 2 oxo glycoside. Both the intermediate and the product were identified by FTIR, 1H NMR, 13 C NMR, 1H 1H COSY and 1H 13 C COSY spectra. The other aromatic amines reaction with 2 oxo glycoside also proved the mechanism. This reaction provides a new method for preparing 2 deoxy 2 aromatic amino 3 oxo glycosides, which is a new kind of material used in assymetric synthesis.展开更多
文摘It was found that photopromoted carbonylation of olefins and CO 2 under ambient conditions could be catalyzed by Co(OAc) 2, Co(acac) 2, CoSalen, Cobalt picolinic ester and[Co(14)-4,11-diene-N 4]I 2[5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-dieneatocobalt(Ⅱ)]. The carbonylation of cyclohexene gave some by-products of cyclo-C 6H 11-CH 2OH, cyclo-C 6H 11-CHO and cyclo-C 6H 11-COCH 3, which were established by labelling studies with 13CO 2, 13CH 3OH, CD 3OD and CD 3COCD 3. CH 3(CH 2) 7-CH 2OH, CH 3(CH 2) 7-CHO and CH 3(CH 2) 7-COCH 3 were also confirmed as the by-products of carbonylation of 1-octene.
文摘Photopromoted carbonylation of bromohydrocarbon catalyzed by cobalt complexes can be carried out under ambient conditions in CH3OH/DMF.It is found that DMF can be decomposed into CO under irradiation and thus can be used as a CO source for the photopromoted carbonylationof bromohydrocarbon,which has been proved by isotope experiment of H13CON（CH3）2.In this paper,the effect of different cobalt catalysts on photopromoted carbonylation of bromohydrocarbon is studied and the way which photopromoted carbonylation of bromohydrocarbon proceed through is deduced.
文摘A novel carbonyl transposition reaction led by aromatic amines nucleophilic addition to \{2 oxo glycoside\} was discovered. The mechanism of the reaction was provided through tracing the change of 1H NMR of a hemiacetal intermediate which was obtained in the reaction of o phenylene diamine with 2 oxo glycoside. Both the intermediate and the product were identified by FTIR, 1H NMR, 13 C NMR, 1H 1H COSY and 1H 13 C COSY spectra. The other aromatic amines reaction with 2 oxo glycoside also proved the mechanism. This reaction provides a new method for preparing 2 deoxy 2 aromatic amino 3 oxo glycosides, which is a new kind of material used in assymetric synthesis.
