摘要:
A process of synthesizing a compound of the formula 1: ##STR1## is described. A compound of the formula 2: ##STR2## is reacted with diphenylphosphinic chloride to activate the carboxylic acid group, and then reacted with methanesulfonyl chloride to produce a compound of formula 4: ##STR3## Compound 4 is then reacted with a group II metal sulfide source in water to produce a compound of formula 1.
摘要:
A process of synthesizing a compound of the formula 1: ##STR1## is described. A compound of the formula 2: ##STR2## is reacted with diphenylphosphinic chloride to activate the carboxylic acid group, and then reacted with methanesulfonyl chloride to produce a compound of formula 4: ##STR3## Compound 4 is then reacted with a group II metal sulfide source in water to produce a compound of formula 1.
摘要:
A stabilized carbapenem intermediate compound represented by the formula 1: or a salt thereof is disclosed, wherein P represents a carboxyl protecting group and X represents a charge balancing group. In addition, a process for synthesizing a compound represented by formula 2: is disclosed wherein X+ is a charge balancing group, comprising: deprotecting a compound of the formula 1 to produce a compound 2.
摘要翻译:公开了由式1表示的稳定化的碳青霉烯中间体化合物或其盐,其中P表示羧基保护基,X表示电荷平衡基团。另外,公开了由式2表示的化合物的合成方法:其中 X +是电荷平衡基团,包括:使式1的化合物去保护以产生化合物2。
摘要:
Crystalline 2S-cis-3-[[(4-mercapto-2-pyrrolidinyl) carbonyl]-amino]benzoic acid and salts and solvates thereof are disclosed. Three different crystalline types are described.
摘要:
A process for synthesizing a compound of the formula I: ##STR1## or a pharmaceutically acceptable salt or ester thereof, wherein each P independently represents H or a protecting group, and R.sup.1 and R.sup.2 independently represent H, C.sub.1-10 alkyl, aryl or heteroaryl, or substituted C.sub.1-10 alkyl, aryl or heteroaryl, comprising:reacting the compounds: ##STR2## or a pharmaceutically acceptable salt or ester thereof, and ##STR3## or a pharmaceutically acceptable salt or ester thereof, wherein X represents OP(O)(OR).sub.2, or OSO.sub.2 R, wherein R represents C.sub.1-6 alkyl, aryl or perfluoro C.sub.1-6 alkyl, in the presence of an amine selected from the group consisting of: diisopropylamine (DIPA), dicyclohexylamine (DCHA), 2,2,6,6-tetramethylpiperidine (TMP), 1,1,3,3-tetramethylguanidine (TMG), 1,8-diazabicyclo�4.3.0!undec-7-ene (DBU) and 1,5-diazabicyclo�4.3.0!non-5-ene to produce a compound of formula I.
摘要:
A process for the preparation of 4-amino-1-hydroxybutylidene-1, 1-bisphosphonic acid or salts thereof which comprises:(a) reacting 4-aminobutyric acid with a mixture of phosphorous acid and PC1.sub.3 in the presence of methanesulfonic acid; and(b) recovering said 4-amino-1-hydroxybutylidene-1, 1-bisphosphonic acid or salts thereof.
摘要:
Biaryl coupling, particularly to form 2,4-difluorobiphenyl, is accomplished by diazotizing an aniline and coupling the benzenediazonium salt with a second aromatic component in the presence of a strong acid, an inert finely divided solid and copper powder or a copper salt.
摘要:
An optically impure diastereomeric salt is purified by treating a suspension of the salt in an appropriate solvent or solvent mixture with the required amount of the desired, optically pure, acid or base.
摘要:
A method of preparing a compound of the formula: ##STR1## where Formula (I) may also have the structure of partial Formula (III); wherein, ##STR2## R' is hydrogen or methyl; R" is hydrogen or .beta.-methyl;R'" is .beta.-methyl or hydroxy;Z is (1) oxo;(2) .beta.-hydrogen and .alpha.-hydroxy; or .alpha.-hydrogen or .alpha.-hydroxyl and(3) (Y).sub.n Q where n=0 or 1, Y is a straight or branched hydrocarbon chain of 1 to 12 carbon atoms andQ is ##STR3## where R.sup.8 is, ##STR4## where the dashed bond replaces the 17.alpha. hydrogen; (6) cyano; or(7) tetrazolyl;and pharmaceutically acceptable salts of the above compounds;CHARACTERIZED IN THAT(I.) a compound of the formula: ##STR5## , where A has the meanings above except --CH.dbd.CH--, is (1) treated with an oxidizing agent at reduced temperatures to form the corresponding 5-oxo-3,5-seco-androstan-3-oic acid compound;(2) treating the product of step (1) with an amine of formula: R.sup.1 NH.sub.2 to form the corresponding 4-aza-5-androsten-3-one compound substituted in the 4-position with R.sup.1 ; and(3) treating the product of step (2) with hydrogen under catalytic conditions to form the compound of Formula I and I & II wherein B is ##STR6## (II.) and where it is desired to prepare compounds of Formula I wherein B is ##STR7## additionally carrying out the following steps on the products prepared by the procedures in (I.) above:(1) alkylating the lactim carbonyl by treating it with trialkyloxonium tetrafluoroborate to form the corresponding alkyl iminium ether, i.e., the compound of Formula I where B is as above and R.sup.4 =OR.sup.5 ;(2) treating the product of step (1) with an amine of formula HNR.sup.6 R.sup.7 followed by treatment with a mineral acid to form the compound of Formula I where B is as above and R.sup.4 =NR.sup.6 R.sup.7 ;(III.) and where it is desired to prepare compounds of Formula I wherein A is --CH.dbd.CH--, additionally carrying out the following steps on the products prepared by the procedures in (I.) above:(1) treating the 1,2 saturated compound with lithium diisopropyl amide to form the corresponding enolate;(2) treating the enolate of step (1) in situ with diphenyldisulfide to form the corresponding .alpha.-phenylthio compound;(3) oxidizing the product of step (2) to form the corresponding sulfoxide compound; and(4) heating the product of step (3) to form the compound of Formula I wherein A is --CH.dbd.CH--.