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Benzoxathiin derivative and its use

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专利汇可以提供Benzoxathiin derivative and its use专利检索,专利查询,专利分析的服务。并且NEW MATERIAL:A compound shown by the formula I [R
1 is H or a group shown by the formula II (at least one of R
2 and R
3 is H or lower alkyl and the other is lower alkyl)] or its acid addition salt.
EXAMPLE: 5-(3-Alkylamino-2-hydroxy)propoxy-3,4-dihydro-1,2-benzoxathiin 2,2- dioxide.
USE: A drug for circulatory organs. Having more improved β
1 selectivity than well- known propranolol or cartorol.
PROCESS: A 5-hydroxy compound shown by the formula VI is reacted with an epihalohydrin shown by the formula VII to give a mixture of 5-(2,3-epoxy)propoxy-3,4-dihydro-1,2-benzoxathiin shown by the formula VIII and 5-(3-halogen-2- hydroxy)propoxy-3,4-dihydro-1,2-benzoxathiin 2,2-dioxide shown by the formula IX, which is reacted with a primary or secondary amine to give a compound shown by the formula I .
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