摘要:
The present invention is directed to a process for preparing intermediates that are useful to prepare certain antibacterial N-formyl hydroxylamine compounds which are peptide deformylase inhibitors. The process makes use a β-lactarn intermediate. Certain optically pure intermediates are also claimed.
摘要:
Improved processes for preparing intermediates useful for preparing antibacterial N-[1-oxo-2-alkyl-3-(N-hydroxyformamido)-propyl}-(carbonylamino-aryl or -heteroaryl)-azacyclo4-7alkanes or thiazacyclo4-7alkanes, which have one or more of the following features: (1) make use of a particular β-lactam intermediate; (2) which make use of a particular resolving agents, enantiomerically pure substituted propionic acids, especially (R)-2-butyl-3-hydroxy-propionic acid; (3) which avoid the use of hydrogen peroxide; and (4) which facilitate selective debenzylation reducing production of waste by-products.
摘要:
The present invention is directed to a process for preparing intermediates that are useful to prepare certain antibacterial N-formyl hydroxylamine compounds which are peptide deformylase inhibitors. The process makes use α β-lactarn intermediate. Certain optically pure intermediates are also claimed.
摘要:
An improved process for producing a water-soluble polymyxin B/dextran conjugate comprises the step of reacting polymyxin B or pharmaceutically acceptable salt thereof with dextran in an aqueous media at a pH of about 9.3 to 10.
摘要:
An improved process for preparing 1,1'-[1,4-phenylenebis-(methylene)]-bis-1,4,8,11-tetraazacyclotetradecane comprising the selective functionalization of an acyclic tetraamine to obtain an acyclic ditosyl intermediate and an acyclic tritosyl intermediate in a first step, the independent dimerization/tosylation of the ditosyl intermediate and dimerization of the tritosyl intermediate to obtain a 1,4-phenylenebis-methylene bridged hexatosyl acyclic precursor in a second step, the cyclization of said precursor to obtain a hexatosyl cyclam dimer in a third step, and the detosylation of said cyclam dimer in a fourth step followed by basification to obtain the desired 1,1'-[1,4-phenylenebis-(methylene)]-bis-1,4,8,11-tetraazacyclotetradecane.
摘要:
Improved processes for preparing intermediates useful for preparing antibacterial N-[1-oxo2-alkyl-3-(N-hydroxyformamido)-propyl}-(carbonylamino-aryl or -heteroaryl)-azacyclo4-7alkanes or thiazacyclo4-7alkanes, which have one or more of the following features: (1) make use of a particular I3-lactam intermediate; (2) which make use of a particular resolving agents, enantiomerically pure substituted propionic acids, especially (R)-2-butyl-3-hydroxypropionic acid; (3) which avoid the use of hydrogen peroxide; and (4) which facilitate selective debenzylation reducing production of waste by-products.
摘要:
Improved processes for preparing intermediates useful for preparing antibacterial N-[1-oxo-2-alkyl-3-(N-hydroxyformamido)-propyl}-(carbonylamino-aryl or -heteroaryl)-azacyclo4-7alkanes or thiazacyclo4-7alkanes, which have one or more of the following features: (1) make use of a particular β-lactam intermediate; (2) which make use of a particular resolving agents, enantiomerically pure substituted propionic acids, especially (R)-2-butyl-3-hydroxy-propionic acid; (3) which avoid the use of hydrogen peroxide; and (4) which facilitate selective debenzylation reducing production of waste by-products.
摘要:
There is described a new polymorphic form of 4-(7-Hydroxy-2-isopropyl-4-oxo-4H-quinazolin-3-yl)-benzonitrile having structural formula I(B) and to a method of preparing it.There is further a process or method for the manufacture of a pharmaceutically active quinazolinone compounds of the formula I wherein the symbols have the meanings given in the description, said process comprising reacting a compound of the formula II, wherein R4* is R1*—C(═O)— wherein R1* is independently selected from the group of meanings of R1 as defined for a compound of the formula I so that R1* and R1 are identical to or different from each other, or R4* is especially H, and R1 and R3, R5 and R6 are as defined for a compound of the formula I, or a salt thereof, under simultaneous or sequential condensation and cyclisation conditions with an aniline compound of the formula III, wherein R2 and m are as defined for a compound of the formula I. Further reactions and related embodiments are also claimed and disclosed.
摘要:
The present invention relates to salts of aryl compounds as discussed below and to methods of manufacture thereof, as well as other subject matter. More particularly, the invention relates to salts useful as intermediates for the synthesis of the cinnamanilide of formula (Y): where Ra is selected from H, OH, C1, C2, C3 or C4 alkyl; and R1 is C1, C2, C3 or C4 alkyl.
摘要:
A process for preparing compounds of the formula ##STR1## where X.sub.1 and X.sub.2 are independently O or S, andR.sub.1 is as defined herein,R.sub.2, R.sub.3, and R.sub.4 are each independently straight or branched chain (C.sub.1-4)alkyl,and pharmaceutically acceptable salts, physiological hydrolyzable esters, and pro-drug forms thereof, which are useful as hypoglycemic agents.