Tetrazole derivatives, and anti-ulcer composition containing the same
申请人:Otsuka Pharmaceutical Company, Limited
公开号:US04372953A1
公开(公告)日:1983-02-08
Tetrazole derivatives of the formula: ##STR1## wherein R.sup.1 is a lower alkykl, phenyl or a group of the formula: --S(O).sub.l --A--(X).sub.m --R.sup.3, and R.sup.2 is hydrogen, a lower alkyl, phenyl or a cycloalkyl when R.sup.1 is the group --S(O).sub.l --A--(X).sub.m --R.sup.3, or R.sup.2 is a group of the formula: --B--CO--R.sup.4 when R.sup.1 is a lower alkyl or phenyl and a pharmaceutically acceptable salt thereof, which have prophylactic or therapeutic activities against peptic and/or duodenal ulcers and are useful as an anti-ulcer drug; processes for the preparation of the tetrazole derivatives; and pharmaceutical composition containing said tetrazole derivatives.
On the basis of measuring the rates of base-catalyzed deuterium exchange the pKa values of a series of 3-halopropyl aryl sulfones and 4-halobutyronitriles were estimated. It was shown that halogen substituents, although separated from the carbanionic site, exert a substantial carbanion stabilizing effect. These effects were rationalized by DFT calculations.
在测量碱催化的氘交换速率的基础上,估算了一系列3-卤代丙基芳基砜和4-卤代丁腈的p K a值。结果表明,卤素取代基尽管与碳负离子位点分开,但发挥了相当大的碳负离子稳定作用。通过DFT计算合理化了这些影响。
Tetrazole derivatives, process for the preparation thereof, and anti-ulcer composition containing the same
申请人:OTSUKA PHARMACEUTICAL CO., LTD.
公开号:EP0035228A1
公开(公告)日:1981-09-09
Tetrazole derivatives of the formula:
wherein R1 is a lower alkyl, phenyl or a group of the formula: -S(O)ℓ-A-(X)m-R3, and R2 is hydrogen, a lower alkyl, phenyl or a cycloalkyl when R' is the group-S(O)ℓ-A-(X)m--R3, or R2 is a group of the formula: -B-CO-R4 when R1 is a lower alkyl or phenyl and a pharmaceutically acceptable salt thereof, which have prophylactic or therapeutic activities against peptic and/or duodenal ulcers and are useful as an anti-ulcer drug; processes for the preparation of the tetrazole derivatives; and pharmaceutical composition containing said tetrazole derivatives.
Carbanions of aryl 3-chloropropylsulfoxides react with nonenolizable aldehydes to give 2,3-disubstituted tetrahydrofurans. Deprotonation of the sulfoxides carried out in the presence of aldehydes results in the addition of the carbanions to the carbonyl group of the aldehydes, followed by 1,5-intra-molecular substitution of the resulting aldol-type anion to produce the tetrahydrofuran ring. The 2-aryl and 3-arylsulfinyl substituents are always in trans relation, and the reaction proceeds with high diastereoselectivity also in respect to the chiral sulfur atom. The diastereoselectivity is attributed to the cyclic transition state of the aldol addition and increases when the aromatic ring of the sulfoxide contains electron-withdrawing substituents, whereas that of the aldehyde has eleetron-donatine groups.