Sumitomo Chemical Company, Limited

Hiromi Shimomura

Junki Katsube

Akihiko Sugie

Hisao Yamamoto

Masanao Matsui

Shun Inokuma

Eichi Murayama

A compound of the formula: ##STR1## wherein A.sub.1 is a single bond or a C.sub.1 -C.sub.5 alkylene group bonding at the 2-, 2'- or 3-position, A.sub.2 is a C.sub.1 -C.sub.3 alkylene group, A.sub.3 is a C.sub.1 -C.sub.4 alkylene group, X is --O-- or --SO.sub.n -- and B is a carboxy group, a C.sub.2 -C.sub.5 alkoxycarbonyl group, a cyano group, an amino group of the formula: ##STR2## or a carbamoyl group of the formula: ##STR3## which is useful as an antiviral agent with no side effect.

Tricyclic cage compounds, their synthesis and use as antiviral agents

Prostanoic acid derivatives of the formula, ##STR1## wherein R.sub.1 is hydrogen or C.sub.1-4 alkyl, R.sub.2 is C.sub.4-8 alkyl and &gt;C=Z is &gt;C=O or ##STR2## are prepared by reacting a cyclopentane of the formula, ##STR3## wherein R.sub.2 is defined above and R is hydrogen or tetrahydropyranyl, with Wittig reagent of the formula,

Cyclopentylacetic acid derivatives

Prostanoic acid derivatives of the formula, ##STR1## wherein R.sub.1 is hydrogen or C.sub.1-4 alkyl, R.sub.2 is C.sub.4-8 alkyl and &gt;C.dbd.Z is &gt;C.dbd.0 or ##STR2## are prepared by reacting a cyclopentane of the formula, ##STR3## wherein R.sub.2 is defined above and R is hydrogen or tetrahydropyranyl, with Wittig reagent of the formula,

Prostanoic acid derivatives

Novel indan compounds of the formula ##STR1## wherein A and X are each ethylene or vinylene; B is C.sub.2-4 alkylene; R and R.sub.2 are each hydrogen or C.sub.1-4 alkyl; R.sub.1 is C.sub.1-8 alkyl; &lt;C = Z is &lt;C = O, or ##STR2## and its non-toxic salts, which are useful as antiulcers, gastric secretion inhibitors, and hypotensors.

Novel indan derivatives

Novel bicycloheptene compounds of the formula: ##STR1## wherein A is C.sub.2 -C.sub.4 alkylene; X and B are each ethylene or vinylene; R.sub.1 is hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.4 -C.sub.8 alkoxyalkyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.5 -C.sub.8 cycloalkylalkyl, aryl, C.sub.7 -C.sub.10 arylalkyl, C.sub.7 -C.sub.10 aryloxyalkyl; R.sub.2 is hydrogen, or C.sub.1 -C.sub.4 alkyl; and Z is carboxyl, C.sub.2 -C.sub.5 alkoxycarbonyl or C.sub.1 -C.sub.5 carbamoyl, and its non-toxic salts, which are useful as antiulcers, gastric secretion inhibitors, central nervous system regulators, and labor inducing agents.

Novel bicycloheptene derivatives

Cyclopentane derivatives of the formula ##SPC1## Wherein R.sup.1 is a group of the formula

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Nishinomiya, Japan

Hiromi Shimomura