尽管对于环化而言,环环烷烃与环戊烷和环己烷环及其同形体在数量上相似,但是在包含平面链段的系统中,GDME对于形成五元环的作用更强。平面五边形的角度小于平面六边形的角度,如Thorpe和Ingold对于小环所建议的那样,由取代基引起的潜在内部键角减小有助于形成五边形。用五元乙内酰脲和含有四原子平面链段的六元二氢尿嘧啶的晶体结构数据说明了该现象。这种Thorpe-Ingold效应解释了N-烷基取代的二氢乳清酸1的碱基重排为乙内酰乙酸3的原因。该反应涉及初始水解为N-(N-烷基氨基甲酰基)天冬氨酸2和随后的环化反应。未取代的N-氨基甲酸酯基天冬氨酸2a在1 M KOH中稳定,N(1)-甲基和乙基化合物2b和2c与乙内酰乙酸3处于平衡状态,而N(1)-异丙基和环己基衍生物的环化2d和2e是不可逆的。关于羧基和NH基团离子化的平衡和pK(a)的实验数据,可以估算涉及N-未取代化合物的平衡和速率,并将
[EN] 2,5-DIOXOIMIDAZOLIDIN-4-YL ACETAMIDES AND ANALOGUES AS INHIBITORS OF METALLOPROTEINASE MMP12.<br/>[FR] 2,5-DIOXOIMIDAZOLIDINE-4-YL ACETAMIDES ET ANALOGUES SERVANT D'INHIBITEURS DE LA METALLOPROTEINASE MMP12.
申请人:ASTRAZENECA AB
公开号:WO2004020415A1
公开(公告)日:2004-03-11
The invention provides compounds of formula (I) in which L, X, Y, Z1, Z2, R1, R2, R3 and G2 have the meanings defined in the specification; processes for their preparation; pharmaceutical compositions containing them; a process for preparing the pharmaceutical compositions; and their use in therapy. The compounds of the invention are inhibitors of metalloproteinase MMP12 and are among other things useful for the treatment of obstructive airways diseases, such as asthma and chronic obstructive pulmonary disease (COPD).
2,5-Dioxoimidazolidin-4-yl acetamides and analogues as inhibitors of metalloproteinase mmp12
申请人:Henriksson Krister
公开号:US20050245586A1
公开(公告)日:2005-11-03
The invention provides compounds of formula (I) in which L, X, Y, Z
1
, Z
2
, R
1
, R
2
, R
3
and G
2
have the meanings defined in the specification; processes for their preparation; pharmaceutical compositions containing them; a process for preparing the pharmaceutical compositions; and their use in therapy. The compounds of the invention are inhibitors of metalloproteinase MMP12 and are among other things useful for the treatment of obstructive airways diseases, such as asthma and chronic obstructive pulmonary disease (COPD).
2,5-Dioxoimidazolidin-4-yl acetamides and analogues as inhibitors of metalloproteinase MMP12
申请人:Henriksson Krister
公开号:US20060276524A1
公开(公告)日:2006-12-07
The invention provides compounds of formula
in which L, X, Y, Z
1
, Z
2
, R
1
, R
2
, R
3
and G
2
have the meanings defined in the specification; processes for their preparation; pharmaceutical compositions containing them; a process for preparing the pharmaceutical compositions; and their use in therapy.