The present invention provides a benzofuran derivative of the formula [1]:
wherein x is a group of the formula: —N═ or —CH═; Y is an optionally substituted amino group, an optionally substituted cycloalkyl group or an optionally substituted saturated heterocyclic group; A is a single bond, a carbon chain optionally having a double bond within or at the end(s) of the chain, or an oxygen atom; R
1
is a hydrogen atom or a halogen atom; Ring B is an optionally substituted benzene ring; and R
3
is a hydrogen atom, or a pharmaceutically acceptable salt thereof, which is useful as a medicament, especially as an activated blood coagulation factor X inhibitor.
The present invention provides a carbamoyl-type benzofuran derivative of the formula [1]:
wherein Ring Z is a group of the formula:
etc.; A is a single bond, and the like; Y is a cycloalkanediyl group, etc.; R
4
and R
5
are the same or different and each is an optionally substituted lower alkyl group, etc.; R
1
is a halogen atom, etc.; Ring B of the formula:
is an optionally substituted benzene ring; and R
3
is a hydrogen atom. etc., or a pharmaceutically acceptable salt thereof, which is useful as an FXa inhibitor.
The present invention provides a benzofuran derivative of the formula [1]:
wherein x is a group of the formula: —N═ or —CH═; Y is an optionally substituted amino group, an optionally substituted cycloalkyl group or an optionally substituted saturated heterocyclic group; A is a single bond, a carbon chain optionally having a double bond within or at the end(s) of the chain, or an oxygen atom; R
1
is a hydrogen atom or a halogen atom; Ring B is an optionally substituted benzene ring; and R
3
is a hydrogen atom, or a pharmaceutically acceptable salt thereof, which is useful as a medicament, especially as an activated blood coagulation factor X inhibitor.