1982
DOI: 10.1016/0040-4020(82)80019-7
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Synthesis of 6-(1-hydroxyethyl)-1,1-dimethyl-1-carba-2-penem derivatives via dieckmann-type cyclization

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Cited by 22 publications
(1 citation statement)
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“…In the chemistry of b-lactam antibiotics, isolations of carboxylic acid derivatives are successfully achieved by formation of amidinium salts [56]. Lewis acid catalysed reaction of 4-substituted 1-trimethylsilyloxyfurans with 4-acetoxyazetidinone chiron leads to highly enantioselective construction of tricyclic carbapenam and penems, in which DBU (1) and Eshenmoser amidine (4) were used for the introduction of the exo double bond on the b-lactam skeleton by demesylation (A route) and the isolation of carboxylic acids as …”
Section: Deprotectionmentioning
confidence: 99%
“…In the chemistry of b-lactam antibiotics, isolations of carboxylic acid derivatives are successfully achieved by formation of amidinium salts [56]. Lewis acid catalysed reaction of 4-substituted 1-trimethylsilyloxyfurans with 4-acetoxyazetidinone chiron leads to highly enantioselective construction of tricyclic carbapenam and penems, in which DBU (1) and Eshenmoser amidine (4) were used for the introduction of the exo double bond on the b-lactam skeleton by demesylation (A route) and the isolation of carboxylic acids as …”
Section: Deprotectionmentioning
confidence: 99%