N--2--chlorobenzyl--2--oxo and n--2--chlorobenzyl--2,2--dioxo--1,2,3--oxathiazolidine derivatives, their preparation and synthesis of thieno[3,2--c]pyridine derivatives therefrom
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United States of America Patent
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May 14, 1996
Issued Date -
N/A
app pub date -
May 19, 1994
filing date -
Jan 31, 1991
priority date (Note) -
Expired
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Abstract
Compounds of the formula: ##STR1## wherein: A is oxo or dioxo; R.sup.1, R.sup.2 and R.sup.3 are independently hydrogen or lower alkyl of one to six carbon atoms; R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are independently hydrogen, lower alkyl of one to six carbon atoms, alkoxy, acyl or halo; are advantageously converted to thieno[3,2-c]pyridine derivatives and the pharmaceutically acceptable salts thereof, particularly ticlopidine hydrochloride.
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