Vicarious nucleophilic substitution of hydrogen in nitroderivatives of five-membered heteroaromatic compounds
作者:Mieczyslaw Makosza、Ewa Kwast
DOI:10.1016/0040-4020(95)00445-e
日期:1995.7
Nitro derivatives of thiophene, furan and pyrrole react with carbanions containing leaving groups giving products of replacement of hydrogen with functionalized alkyl substituents. Many specific features of this reaction are discussed.
Unusual orientation in vicarious nucleophilic substitution of hydrogen in nitropyrroles
作者:Kwast Ewa、Mieczysław Makosza
DOI:10.1016/s0040-4039(00)94350-8
日期:1990.1
The vicariousnucleophilicsubstitution of hydrogen in N-substituted 2-nitropyrrole with carbanion of chloromethyl phenyl sulfone occurs at position 5- or 3- depending upon electronic effects of the N-protecting group.
取决于N-保护基团的电子效应,N-取代的2-硝基吡咯中的氢的取代基被氯甲基苯基砜的碳负离子取代。
KWAST, EWA;MAKOSZA, MIECZYSLAW, TETRAHEDRON LETT., 31,(1990) N, C. 121-122
作者:KWAST, EWA、MAKOSZA, MIECZYSLAW
DOI:——
日期:——
Mencarelli, Paolo; Torres, Maria Del Mar Salas, Gazzetta Chimica Italiana, 1991, vol. 121, # 3, p. 109 - 112
作者:Mencarelli, Paolo、Torres, Maria Del Mar Salas
DOI:——
日期:——
MODIFIED tRNA CONTAINING UNNATURAL BASE AND USE THEREOF
申请人:Sekine Shun-ichi
公开号:US20100323364A1
公开(公告)日:2010-12-23
In the method for introducing a noncanonical amino acid residue into a desired position in a protein, the structure of tRNA is so modified as to have improved affinity for aminoacyl-tRNA synthetase or improved specificity to aminoacyl-tRNA synthetase. An unnatural base is contained at any position in tRNA, whereby the efficiency of aminoacylation of the tRNA with a noncanonical amino acid can be improved.