3-(5-Tetrazolyl)thioxanthone-10,10-dioxide sodium salt 、 sodium hydroxide 、 盐酸 在
N,N-二甲基甲酰胺 作用下,
反应 2.0h,
以to give the title compound (14.95 g), m.pt. 296° C. (decomposes)的产率得到3-(5-Tetrazolyl)xanthone
参考文献:
名称:
Tetrazolyl substituted tricyclic compounds and pharmacological
Tricyclic compounds, preparation, use and intermediates
申请人:THE WELLCOME FOUNDATION LIMITED
公开号:EP0093381A1
公开(公告)日:1983-11-09
Tricyclic compounds of formula (I)
wherein
X' is a carboxyl or 5-tetrazolyl group
X2 is carbonyl or methylene
X3 is hydroxyl or a group -X4(CnH2n)X5
where
X4 is oxygen or sulphur
X6 is hydrogen or a group -OX6
where
X6 is hydrogen, alkanoyl of 1 to 4 carbon atoms or a group -(CmH2m)X7
where
X7 is hydrogen or a group -OX8
where
X8 is hydrogen or alkanoyl of 1 to 4 carbon atoms and m and n are each, independently, an integer from 1 to 4, together with salts thereof,
provided that when X5 is a group -OX6 then n is always greater than 1 and X4 and X5 are attached to different carbon atoms
and that when X7 is a group -OX8 then m is always greater than 1 and no single carbon atom in the radical -(CmH2m)-is attached to two oxygen atoms.
These compounds are of value in medicine in circumstances where it is desirable to provide a more effective delivery of oxygen to the tissues; in vivo applications include the relief or amelioration of tissue hypoxia as in, for example, cardiac or cerebral ischaemia while in vitro they maintain the oxygen-delivery capacity of stored red blood cells and prolong the cells' useful storage life.
The invention is also directed to methods for the preparation of the compounds, to pharmaceutical formulations and other presentation forms containing them and the preparation thereof, to the use of the compounds in medicine, and to novel intermediates for the said compounds and the preparation thereof.
Tetrazolyl substituted tricyclic compounds and pharmacological
申请人:Burroughs Welcome Co.
公开号:US04902701A1
公开(公告)日:1990-02-20
Tricyclic compounds of formula (I) ##STR1## wherein X.sup.1 is a carboxyl or 5-tetrazolyl group X.sup.2 is carbonyl or methylene X.sup.3 is hydroxyl or a group --X.sup.4 (C.sub.n H.sub.2n)X.sup.5 where X.sup.4 is oxygen or sulphur X.sup.5 is hydrogen or a group --OX.sup.6 where X.sup.6 is hydrogen, alkanoyl of 1 to 4 carbon atoms or a group --(C.sub.m H.sub.2m)X.sup.7 where X.sup.7 is hydrogen or a group --OX.sup.8 where X.sup.8 is hydrogen or alkanoyl of 1 to 4 carbon atoms and m and n are each, independently, an integer from 1 to 4, together with salts thereof, provided that when X.sup.5 is a group --OX.sup.6 then n is always greater than 1 and X.sup.4 and X.sup.5 are attached to different carbon atoms and that when X.sup.7 is a group --OX.sup.8 then m is always greater than 1 and no single carbon atom in the radical --(C.sub.m H.sub.2m)-- is attached to two oxygen atoms. These compounds are of value in medicine in circumstances where it is desirable to provide a more effective delivery of oxygen to the tissues; in vivo applications include the relief or amelioration of tissue hypoxia as in, for example, cardiac or cerebral ischaemia while in vitro they maintain the oxygen-delivery capacity of stored red blood cells and prolong the cells' useful storage life. The invention is also directed to methods for the preparation of the compounds, to pharmaceutical formulations and other presentation forms containing them and the preparation thereof, to the use of the compound in medicine, and to novel intermediates for the said compounds and the preparation thereof.