摘要:
[Constitution] A compound represented by the formula [I], [Chemical Formula 1]
[wherein X stands for a methine group or a nitrogen atom; R¹ stands for a hydrogen atom, an optionally substituted lower alkyl group or a halogen atom; R² and R³ respectively stand for a hydrogen atom or an optionally substituted lower alkyl group, or, taken together, may form a 5- to 7-membered ring combined with the adjacent -C=C-; R⁴ and R⁵ respectively stands for a hydrogen atom or an optionally substituted lower alkyl group or, taken together, form a 3- to 7-membered homo- or hetero-cyclic ring combined with the adjacent carbon atom; A stands for an optionally substituted amino group; m and n denote 1 to 4, respectively], salts thereof, a method of preparing same or pharmaceutical compositions containing same. [Effects] Excellent antiasthmatic agents
摘要翻译:由下式表示的新化合物:其中X代表次甲基(即基团-CH =)或氮原子; R 1表示氢原子,任选取代的低级烷基或卤素原子; R 2和R 3分别表示氢原子或任选取代的低级烷基,或者一起可以形成与相邻的-C = C-结合的5-至7-元环; R 4和R 5分别表示氢原子或任选取代的低级烷基,或者一起形成与相邻碳原子结合的3-至7-元同 - 或杂 - 环; A代表任选取代的氨基; m和n分别表示1至4个或其盐,其具有抗过敏,抗炎和抗PAF活性,并且可用作抗哮喘药。
摘要:
Optically active β-lactams of the general formula wherein R 1 is an amino or protected amino group, R 2 is an organic residue bonding through a carbon atom thereof and R 3 is the residue remaining after removal of the a-amino group from an optically active a-amino acid or a derivative thereof as well as a method of producing the same.
摘要:
The invention relates to novel 3-methoxy-2-oxoazetidine derivatives, which are shown by the following formula: wherein R is amino, acylated amino or protected amino, and to methods for their production. These derivatives are of value as intermediates for the synthesis of useful compounds represented by the formula: wherein R, has the same meaning as defined above, as drugs in the treatment of bacterial infections.
wherein R¹ stands for a hydrogen atom, an optionally substituted lower alkyl group or a halogen atom; R² and R³ respectively stand for a hydrogen atom or an optionally substituted lower alkyl group, provided that either R² or R³ is a hydrogen atom, the other being an optionally substituted lower alkyl group, or R² and R³ may, taken together with the adjacent -C=C- group, form a 5- to 7-membered ring; X stands for an oxygen atom or S(O) p (p stands for an integer from 0 to 2; Y stands for a group of the formula:
(R⁴ and R⁵ respectively stand for a hydrogen atom or an optionally substituted lower alkyl group) or a divalent group derived from an optionally substituted 3- to 7-membered homocyclic or heterocyclic ring; R⁶ and R⁷ each stands for a hydrogen atom, an optionally substituted lower lakyl group, an optionally substituted cycloalkyl group or an optionally substituted aryl group, or R⁶ and R⁷ may, taken together with the adjacent nitrogen atom, form an optionally substituted nitrogen-containing heterocyclic group; m stands for an integer from 0 to 4; and n stands for an integer from 0 to 4, or a salt thereof, which has excellent anti-.PAF activities, and is of value as an antiasthmatic agent, and their production, intermediates and pharmaceutical compositions.
摘要:
The compound represented by the formula: where R' stands for amino or an organic residue bonded through nitrogen; R 2 stands for carooxyl ora group derivable therefrom; R 3 , R 4 , R 5 , R 6 , R 7 and R 8 independently stand for hydrogen or an organic residue, including the case where R 5 or R 6 forms a chemical bond or a ring with R 7 or R 8 : X stands for hvdrogen, methoxy or formylamino; or a salt thereof, pro- duceaole by the present method. exnibits excellent antimicrobial activity, and is utilized as antimicrobial agents.
摘要:
Optically active β-lactams of the general formula wherein R 1 is an amino or protected amino group, R 2 is an organic residue bonding through a carbon atom thereof and R 3 is the residue remaining after removal of the a-amino group from an optically active a-amino acid or a derivative thereof as well as a method of producing the same.
wherein R¹ stands for H, an optionally substituted lower alkyl group or a halogen; R² and R³ respectively stands for a hydrogen or an optionally substituted lower alkyl group, or R² and R³ may, taken together with the adjacent -C=C- group, form a 5- to 7-membered ring; X stands for O, SO or SO₂; Y stands for a group of the formula:
(R⁴ and R⁵ respectively stand for H or an optionally substituted lower alkyl group) or a divalent group derived from an optionally substituted 3- to 7-membered homocyclic or heterocyclic ring; R⁶ and R⁷ each stands for H, an optionally substituted lower alkyl group, an optionally substituted cycloalkyl group or an optionally substituted aryl group, or R⁶ and R⁷ may, taken together with the adjacent N, form an optionally substituted N-containing heterocyclic group; m stands for 0 to 4; n stands for 0 to 4, or a salt thereof, which has excellent anti-PAF activities anti-LTC₄ activities and anti-ET-1 activities, and is of value as an antiasthmatic agent, and their production, intermediates and pharmasceutical compositions.