L-PhGly-ONa;phenylglycine;sodium (S)-phenylglycinate;(S)-sodium 2-phenylglycinate;sodium salt of D(-)-α-phenylglycine;sodium D-α-phenylglycine;sodium L-phenylglycinate;sodium;(2S)-2-amino-2-phenylacetate
Asymmetric cyanosilylation of alkynyl ketones with the catalyst systems consisting of amino acid/2,2′‐bis(diphenylphosphino)‐1,1′‐binaphthyl (BINAP)/ruthenium(II) complex and lithium phenoxide (Ru⋅Li cat.) was studied. The reaction was conducted in tert‐butyl methyl ether (TBME) at −78 °C with a substrate‐to‐catalyst molar ratio (S/C) as high as 2000. A series of simple and functionalized ketones was converted
Compounds of the formula ##STR1## wherein A is phenyl; 4-hydroxy-phenyl; 2- or 3-thienyl; cyclohexyl; cyclohexen-1-yl; cyclohexa-1, 4-dien-1-yl; or 3,4-disubstituted phenyl, where the substituents may be identical to or different from each other and are selected from the group consisting of chlorine, hydroxyl or methoxy; and R is an aliphatic, cycloaliphatic; aromatic or heterocyclic group of diverse types; and non-toxic, pharmacologically acceptable salts thereof formed with inorganic or organic bases. The compounds as well as their salts are useful as antibiotics.
Preparation of Diastereomerically Pure and Mixed (<i>S</i>)-PhGly/BIPHEP/Ru(II) Complexes and Their Catalytic Behavior with Li<sub>2</sub>CO<sub>3</sub> in Asymmetric Cyanosilylation of Benzaldehyde
作者:Nobuhito Kurono、Taiki Katayama、Takeshi Ohkuma
DOI:10.1246/bcsj.20120351
日期:2013.5.15
A diastereomerically mixed complex [Ru(S)-phgly}2(±)-biphep}] is readily prepared from achiral diphosphine BIPHEP in two steps. These diastereomers are then separated by silica gel column chromatography. A 61:39 equilibrium mixture of [Ru(S)-phgly}2(S)-biphep}] and [Ru(S)-phgly}2(R)-biphep}] with Li2CO3 is used to catalyze cyanosilylation of benzaldehyde to afford the R cyanated product in 92% ee. The enantioselectivity is just slightly lower than that by using the pure [Ru(S)-phgly}2(S)-biphep}]/Li2CO3 catalyst system of 96%. The high enantioselective ability of the diastereomerically mixed catalyst is revealed through a series of kinetic experiments in which the highly enantioselective [Ru(S)-phgly}2(S)-biphep}]/Li2CO3 system is shown to catalyze the reaction 16.8 times faster than the less selective [Ru(S)-phgly}2(R)-biphep}]/Li2CO3 system, affording the product in 2.6% ee. An equation is derived to approximate the relationship between the diastereomeric ratio of the catalyst and the ee value of the product.
Rapid-acting insulin formulation comprising a substituted anionic compound
申请人:ADOCIA
公开号:US10583175B2
公开(公告)日:2020-03-10
A composition in aqueous solution includes insulin and at least one substituted anionic compound chosen from substituted anionic compounds consisting of a backbone formed from a discrete number u of between 1 and 8 (1≤u≤8) of identical or different saccharide units, linked via identical or different glycoside bonds, the saccharide units being chosen from the group consisting of hexoses, in cyclic form or in open reduced form, said compound comprising partially substituted carboxyl functional groups, the unsubstituted carboxyl functional groups being salifiable. A pharmaceutical formulation including the composition is also set forth.