نتایج جستجو برای: chiral auxiliaries
تعداد نتایج: 38094 فیلتر نتایج به سال:
The high antiplasmodial activity of racemic benzylamines rac-1 and rac-2 stimulated the synthesis of pure enantiomers. Ellman's chiral sulfinamides (S)-6 and (R)-6 were used as chiral auxiliaries. Condensation of prochiral ketone 5 with enantiomerically pure sulfinamides (S)-6 and (R)-6 and subsequent NaBH4 reduction provided predominantly unlike configured diastereomers (S,R)-8 and (R,S)-8 (ra...
The purpose of the study was to determine the contribution of nursing auxiliaries towards health care services, against their scope of practice. The sample consisted of nursing auxiliaries in the Gazankulu area, in the Northern Transvaal. The findings revealed that nursing auxiliaries are presently an essential component of nursing services rendered in Gazankulu, but that apart from their presc...
One-pot, four-component procedure for the synthesis of a small library of new chiral spiro- oxindolopyrrolidines with high regio-, diastereo- (>99:1 dr), and enantioselectivity (up to 80% ee) is described. In this process, the regio- and stereochemical 1,3-dipolar cycloaddition of azomethine ylides, which were generated insitu by the reaction of isatin derivatives and sarcosin,with optically ac...
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