摘要:
A process for the asymmetric epoxidation of α,β-unsaturated carbonyl or sulphonyl compounds comprising : providing, in the absence of an aqueous phase, a catalyst/reagent composition comprising a poly-amino acid catalyst effective for catalysing the asymmetric epoxidation reaction, the poly-amino acid catalyst encapsulating an expoxidation reagent effective for epoxidation of α,β-unsaturated carbonyl or sulphonyl compounds; contacting the catalyst/reagent composition with an α,β-unsaturated carbonyl or sulphonyl compound substrate under conditions effective to provide at least partial asymmetric epoxidation of the substrate by the epoxidation reagent; and recovering the resulting asymmetric epoxide.
摘要:
Compounds of formulae (I) or (II): wherein R is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton, and R1 and R2 are H, or an -OR3 group in which R3 is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group containing 4-12 carbon atoms, that optionally includes at least one heteroatom in its carbon skeleton, and R1 and R2 cannot both be H, and their use in therapeutic methods.
摘要:
Compounds of formulae (I) or (II): wherein R is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton, and R?1¿ and R?2¿ are H, or an -OR?3¿ group in which R?3¿ is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group containing 4-12 carbon atoms, that optionally includes at least one heteroatom in its carbon skeleton, and R?1¿ and R?2¿ cannot both be H, and their use in therapeutic methods.
摘要:
A process for preparing an optically-enriched chiral epoxide of formula (I), wherein R , R and R are each independently selected from H, R, R-CO- and R-O-CO-, each R independently being substantially a hydrocarbon group of up to 20 carbon atoms, and X is an alkyl or cycloalkyl group of up to 10 carbon atoms, provided that -CO-X is not enolisable, which comprises the asymmetric epoxidation of a corresponding prochiral alkene of the formula (II): R R C=CR -CO-X, by reaction with an oxidant in the presence of a chiral catalyst. Many optically-enriched epoxides (I) are novel.
摘要翻译:制备式(I)的光学富集手性环氧化物的方法,其中R 1,R 2和R 3各自独立地选自H,R,R-CO-和RO-CO-, 每个R独立地基本上是至多20个碳原子的烃基,X是至多10个碳原子的烷基或环烷基,条件是-CO-X不是可烯化的,其包括对应的前手性烯烃的不对称环氧化 式(II)的化合物:R 1 R 2 C = CR 3 -CO-X,通过在手性催化剂的存在下与氧化剂反应。 许多光学富集的环氧化物(I)是新颖的。
摘要:
A compound of formula (I), (II), (III) or (IV); wherein R 1 and R 2 are each, independently, hydrogen or an alkyl group containing 1-4 carbon atoms; R 3 is hydrogen, or a substituted or unsubstituted alkyl or alkenyl group containing 1-3 carbon atoms; R 4 is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton and contains 1-12 carbon atoms; R 5 is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton and contains 1-12 carbon atoms; Y is hydrogen or a halogen; X is oxygen or NR 6 ; R 6 is hydrogen, a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton and contains 1-12 carbon atoms, -COOR 7 , -SO 2 R 7 , -OSO 2 R 7 , or -COR 7 ; and R 7 is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton and contains 1-20 carbon atoms.
摘要翻译:式(I),(II),(III)或(IV)的化合物; 其中R 1和R 2各自独立地为氢或含有1-4个碳原子的烷基; R 3是氢或含有1-3个碳原子的取代或未取代的烷基或链烯基; R 4是取代或未取代的烷基,烯基,炔基,芳基,芳烷基芳烯基或芳炔基,其任选地在其碳骨架中包含至少一个杂原子并含有1-12个碳原子; R 5是取代或未取代的烷基,烯基,炔基,芳基,芳烷基芳烯基或芳炔基,其任选地在其碳骨架中包含至少一个杂原子并含有1-12个碳原子; Y是氢或卤素; X是氧或NR 6; R 6是氢,取代或未取代的烷基,烯基,炔基,芳基,芳烷基芳烯基或芳炔基,其任选地在其碳骨架中包含至少一个杂原子并含有1-12个碳原子,-COOR 7 ,-SO 2 R 7,-OSO 2 R 7或-COR 7; 并且R 7是取代或未取代的烷基,烯基,炔基,芳基,芳烷基芳烯基或芳炔基,其任选地在其碳骨架中包含至少一个杂原子并含有1-20个碳原子。
摘要:
Compounds of formula (I) or (II), wherein R is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton, and R 1 is a substituted or unsubstituted, branched or straight chain alkyl, alkenyl, or alkynyl group, that contains 1-12 carbon atoms, and there use in therapeutic methods.
摘要:
4-Hydroxy- delta -lactones are useful intermediates in the preparation of inhibitors of the enzyme (HMG-CoA reductase) that is rate-limiting in cholesterol biosynthesis. They are prepared from synthons of the formula (A) wherein either Y is H and - &cir& _- &cir& _- &cir& _ is a double bond or epoxide, or Y is optionally-blocked OH (above the ring, opposite to Z) and - &cir& _- &cir& _- &cir& _ is a single bond; and Z is an organic group.
摘要:
A compound of formula (I) or (II): wherein A is hydrogen or CR 1 R 2 ; Y and Z are each, independently, hydrogen or a halogen;X is -NR 4 R 5 , or R 7 ; R 1 is hydrogen, or a substituted or unsubstituted alkyl or alkenyl group containing 1-4 carbon atoms; when X is -NR 4 R 5 , R 2 is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton and contains 1-12 carbon atoms; when X is R 7 , R 2 is an unsubstituted alkyl, alkenyl or alkynyl group, or a substituted or unsubstituted aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton and contains 1-12 carbon atoms; R 3 is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton and contains 1-12 carbon atoms; R 4 is hydrogen, a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton and contains 1-12 carbon atoms, -COOR 8 , or -COR 8 ; R 5 is hydrogen, or a substituted or unsubstituted alkyl or alkenyl group containing 1-5 carbon atoms; R 7 is an unsubstituted alkyl, alkenyl, or alkynyl group, that contains 1-4 carbon atoms; and, R 8 is an unsubstituted or halo-substituted alkyl, aryl, or aralkyl group, that contains 1-12 carbon atoms.
摘要翻译:式(I)或(II)的化合物:其中A是氢或CR 1 R 2; Y和Z各自独立地为氢或卤素; X为-NR 4 R 5或R 7; R 1是氢或含有1-4个碳原子的取代或未取代的烷基或链烯基; 当X是-NR 4 R 5时,R 2是取代或未取代的烷基,烯基,炔基,芳基,芳烷基芳烯基或芳炔基,其任选地在其碳骨架中包括至少一个杂原子,并且含有 1-12个碳原子; 当X是R 7时,R 2是未取代的烷基,烯基或炔基,或取代或未取代的芳基,芳烷基芳烯基或芳炔基,其任选地在其碳骨架中包含至少一个杂原子,并含有1 -12个碳原子; R 3是任选地在其碳骨架中包含至少一个杂原子并且含有1-12个碳原子的取代或未取代的烷基,烯基,炔基,芳基,芳烷基芳烯基或芳炔基, R 4是氢,取代或未取代的烷基,烯基,炔基,芳基,芳烷基芳烯基或芳炔基,其任选地在其碳骨架中包含至少一个杂原子并含有1-12个碳原子,-COOR 8 或-COR 8; R 5是氢或含有1-5个碳原子的取代或未取代的烷基或链烯基; R 7是含有1-4个碳原子的未取代的烷基,烯基或炔基; 并且R 8是含有1-12个碳原子的未取代或卤素取代的烷基,芳基或芳烷基。
摘要:
A compound comprising a cyclopentanone, cyclopentenone, cyclohexanone or cyclohexenone group, wherein a first ring carbon atom carries an -SR substituent, R is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl, aralkenyl, or aralkynyl group that, optionally, includes at least one heteroatom in its carbon skeleton, the remaining available ring carbon atoms are optionally substituted, and said compound either:- (a) is more soluble in water at a temperature of 20 - 40°C; (b) is less lipophilic; and/or, (c) has a greater therapeutic index; or; (d) is less soluble in water at a temperature of 20 - 40°C; (e) is more lipophilic; and/or, (f) has a greater therapeutic index; than an equivalent cyclohex-2-en-1-one or cyclopent-2-en-1-one derivative in which a hydrogen atom replaces said - SR group.
摘要:
A compound comprising a cyclopentanone, cyclopentenone, cyclohexanone or cyclohexenone group, wherein a first ring carbon atom carries an -SR substituent, R is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl, aralkenyl, or aralkynyl group that, optionally, includes at least one heteroatom in its carbon skeleton, the remaining available ring carbon atoms are optionally substituted, and said compound either:- (a) is more soluble in water at a temperature of 20 - 40°C; (b) is less lipophilic; and/or, (c) has a greater therapeutic index; or; (d) is less soluble in water at a temperature of 20 - 40°C; (e) is more lipophilic; and/or, (f) has a greater therapeutic index; than an equivalent cyclohex-2-en-1-one or cyclopent-2-en-1-one derivative in which a hydrogen atom replaces said - SR group.