Vaccine Policy in India

India enjoyed early initial successes in vaccine development and indigenous production of vaccines in the public sector. But the country now faces a growing gap between the demand for and supply of essential vaccines

Diphenylphosphinoyl chloride as a chlorinating agent - The selective double activation of 1,2-diols

© The Royal Society of Chemistry 2006Treatment of 1,2-diols with diphenylphosphinoyl chloride in pyridine produces beta-chloroethyl phosphinates which react with complete control of stereochemistry to give epoxides and azido-alcohols, useful intermediates in cyclopropane synthesis.David J. Fox, Daniel Sejer Pedersen, Asger B. Petersen and Stuart Warre

Reversal of facial selectivity in the kinetic resolution of olefin via asymmetric dihydroxylation (AD) reaction: Synthesis of optically active (–)-miiltlactone and (+)-isomintlactone by AD reaction from intrinsically disfavoured diastereoface of alkene

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Моделирование электрической нагрузки в установившихся и переходных режимах

Исследованы возможности современных программных комплексов в части моделирования нагрузки в переходных режимах и влияние вида и параметров моделей нагрузки на результаты расчета динамической устойчивости генераторов энергосистем.The possibilities of modern software systems in terms of load modeling in transient modes and the influence of the type and parameters of load models on the results in calculating the dynamic stability of power system generators are studied

Stereos elective transformations of polyhydroxyazepanes to piperidine and pyrrolidine derivatives-Efficient glycosidase inhibitors

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tert-Butyl 2-hy­droxy-3-(4-methyl­benzene­sulfonamido)­butano­ate

In the crystal of the title compound, C15H23NO5S, mol­ecules are linked through N—H⋯O and O—H⋯O hydrogen-bond inter­actions, resulting in centrosymmetric dimers in which the N—H⋯O inter­actions generate R 2 2(12) rings and the O—H⋯O inter­actions generate R 2 2(14) rings. Weak inter­molecular C—H⋯O inter­actions are also observed

(2R,3S)-Methyl 2-hy­droxy-3-(4-methyl­benzene­sulfonamido)-3-phenyl­propano­ate

In the title mol­ecule, C17H19NO5S, the p-tolyl ring is oriented approximately parallel to the phenyl ring [dihedral angle = 17.2 (1)°], resulting in an intra­molecular π–π inter­ation [centroid–centroid distance = 3.184 (10) Å]. In the crystal, mol­ecules are linked through O—H⋯O and C—H⋯O hydrogen bonds, forming hydrogen-bonded sheets lying diagonally across the ac face

Intramolecular SN2 ring opening of cyclic sulfates: 6-exo-Tet versus 7-endo-Tet cyclization

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