Inventor
ERMANN PETER H
DE9 patents
Patents
9 patentsUS4633017ADec 30, 1986
N-hydroxy protecting groups and process for the preparation of 3-acylamino-1-hydroxy-2-azetidinones
SQUIBB & SONS INC50 citations94
US4581170AApr 8, 1986
N-hydroxyl protecting groups and process and intermediates for the preparation of 3-acylamino-1-hydroxy-2-azetidinones
SQUIBB & SONS INC52 citations94
US4777252AOct 11, 1988
2-oxo-1-[[(substituted sulfonyl)amino]-carbonyl]azetidines
SQUIBB & SONS INC45 citations92
US5037983AAug 6, 1991
6,7-dihydroxyquinoxalines as intermediates to beta-lactam antibiotics
SQUIBB & SONS INC6 citations73
US4904775AFeb 27, 1990
Heteroaroylhydrazide derivatives of monocyclic beta-lactam antibiotics
SQUIBB & SONS INC8 citations73
US5270334ADec 14, 1993
4-methoxy-5-methyl-pyran-3-ol natural products and derivatives thereof
SQUIBB & SONS INC7 citations71
US4801705AJan 31, 1989
2-oxo-1-(((substituted sulfonyl)amino)-carbonyl)azetidines
SQUIBB & SONS INC3 citations61
US5318963AJun 7, 1994
Heterocyclic hydrazide derivatives of monocyclic β-lactam antibiotics
SQUIBB & SONS INC5 citations60
US4871841AOct 3, 1989
2-Oxo-1-[[(substituted sulfonyl)amino]-carbonyl]azetidines
SQUIBB & SONS INC1 citations50