1985
DOI: 10.1039/c39850001775
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Synthesis of the phosphodiesterase inhibitors PDE-I and PDE-II

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1986
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Cited by 16 publications
(4 citation statements)
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“…Independent methanolysis of the separated diastereomers provided enantiomerically pure intermediates. Conversion of the primary alcohol to the chloride and acid-catalyzed deprotection followed by coupling of the unstable indoline hydrochloride with 5,6,7-trimethoxyindole-2-carboxylic acid , provided the enantiomerically pure penultimate intermediates. Final Winstein spirocyclization completed the synthesis of (+)-and ent -(−)-duocarmycin SA.…”
Section: Duocarmycinsmentioning
confidence: 99%
“…Independent methanolysis of the separated diastereomers provided enantiomerically pure intermediates. Conversion of the primary alcohol to the chloride and acid-catalyzed deprotection followed by coupling of the unstable indoline hydrochloride with 5,6,7-trimethoxyindole-2-carboxylic acid , provided the enantiomerically pure penultimate intermediates. Final Winstein spirocyclization completed the synthesis of (+)-and ent -(−)-duocarmycin SA.…”
Section: Duocarmycinsmentioning
confidence: 99%
“…It is noteworthy that preparation of the indolecarboxylic acid moiety involved once again a successful implementation of the copper-mediated aryl amination (Scheme ). Thus, the Horner−Wadsworth−Emmons reaction of aldehyde 15 with phosphonate 16 furnished the requisite amination precursor 17 with excellent stereocontrol.…”
mentioning
confidence: 99%
“…it has become commonplace to instead remove the carboxyl function at the indole-2-position by decarbonylative procedures,® burdening any synthetic tree with additional steps. 6 In connection with our studies on microwaveaccelerated synthetic transformations,7 we reasoned that microwave-induced thermolysis of indole-2-carboxylate derivatives may allow decarboxylation to be accomplished with ease and now wish to report a successful protocol.…”
mentioning
confidence: 99%