申请人:Terragen Discovery Inc.
公开号:US06197811B1
公开(公告)日:2001-03-06
A compound selected from the group consisting of a 5,6-dihydro-&agr;-pyrone of formula (I):
wherein bond a is oriented either or ;
X is O or NH;
R1 is selected from the group consisting of:
a group R3(O)C— wherein R3 is selected from the group consisting of: (i) a group of formula R4—CH═CH— wherein R4 is C1-C20 alkyl, C2-C20 alkenyl, an aryl group,
or a 5- or 6-membered unsaturated heterocyclic ring containing one or two O, N or S atoms, (ii) C2-C20 alkyl;
and (iii) an aryl group or a substituent which is a fused ring system of formula (1) or (2):
wherein each of R′ and R″, which are the same or different and may occupy any position on ring a or ring b of said fused ring system, is H or C1-C6 alkyl;
a group ArCH2— wherein Ar is an aryl group; and
a group R5O—CH2— wherein R5 is C1-C6 alkyl optionally interrupted by one or two O atoms; and
R2 is CH3 or, when R1 is a group of formula (A) as defined below, R2 is R6OOC— or R6NOC— wherein R6 is C1-C6 alkyl;
and the pharmaceutically and veterinarily acceptable salts and esters thereof; with the exception of compounds wherein bond a is oriented ,
X is O and R1 is a group of formula (A):
wherein R11 and R21 are H when R2 in formula (I) is CO2H or CH3, or one of R11 and R21 is H and the other is OH when R2 in formula (I) is CO2H.
从以下组中选择的一种化合物,为式(I)的5,6-二氢-α-吡喃:其中键a朝向任一或;X为O或NH;R1从以下组中选择:一组R3(O)C—,其中R3从以下组中选择:(i)一个式R4—CH═CH—的基团,其中R4为C1-C20烷基,C2-C20烯基,芳基,或含有一个或两个O、N或S原子的5-或6-成员不饱和杂环环,(ii)C2-C20烷基;以及(iii)芳基或一个式(1)或(2)的融合环系统的取代基:其中R′和R″分别为H或C1-C6烷基,它们相同或不同且可以占据所述融合环系统的环a或环b上的任意位置;一组ArCH2—,其中Ar为芳基;和一组R5O—CH2—,其中R5为C1-C6烷基,可选地被一个或两个O原子中断;R2为CH3或者当R1为下述式(A)的基团时,R2为R6OOC—或R6NOC—,其中R6为C1-C6烷基;以及其药学和兽医学上可接受的盐和酯;除了键a朝向,X为O且R1为式(A)的基团的化合物。