p-Hydroxyphenylsulfonium salts and their use in the preparation of esters and amides
申请人:SANSHIN KAGAKU KOGYO CO., LTD.
公开号:EP0245662A1
公开(公告)日:1987-11-19
This invention is characterized by synthesizing an active ester represented by the general formula
using an active esterifying agent consisting of a sulfonium salt represented by the general formula
and further reacting the above-said active ester with a nucleophilic agent represented by the general formula H-B-Y to produce an ester or amide represented by the general formula (W)d A-B-Y,
wherein A represents -CO-, -SO2-, >PO-, or >PS- groups; R, represents a hydrogen, an alkyl group, a halogen group, a nitro group, or an alkoxy group; R2 and R3, which may be same or different, each represents an alkyl group; X⊖ represents an anion typified by a halogen ion, a perchloric acid ion, a hydrogensulfuric acid ion, a methylsulfuric acid ion, and a p-toluenesulfonic acid ion; for W and d,
when the above A is a divalent group, d is 1, and W represents an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, an alkyl group of C1-C5 substituted by 1-3 halogen atoms, a group
(wherein R4 and R5, which may be same or different, ead represents a hydrogen, a hydroxyl group, a mercapto group an alkyl group, or an aryl group; when Q is oxygen or sulfur, U is 0, and Re represents a hydrogen, an alkyl group, an ary group, a cycloalkyl group, an alkenyl group, an alkynyl group or an aralkyl group; when Q is nitrogen, u is 1, and R6 and R'6, which may be same or different, each represents a hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or an aralkyl group; and k represents an integral number of 1-4), an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, an aralkoxy group represented by
(wherein Rn represents a hydrogen, a halogen atom, an alkyl group, an alkoxy group, an alkylthio group, an alkylsulfonyl group, an aryl group, or a group
R7 and Rs, which may be same or different, each represents a hydrogen or an alkyl group; and m represents an integral number of 1-4), an isobonyloxy group, a furfuryloxy group, a fluorenylmethoxy group, or a group R9-R10N- (wherein R9 and R10, which may be same or different, each represents a hydrogen, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or an aralkyl group, or R9 and R10 may be combined each other to form a ring having 3-6 carbon atoms, when occasion demands, containing other hetero atoms), when the above A is particularly
W may be an amino acid group in which a proper protective group is introduced or not Introduced in the α-amino group and/or the side chain together with W-Cl-, and/or a group or a peptide or protein, and
②when the above A is a trivalent group, d is 2 and, in this case, two Ws, which may be same or different, each represents an alkoxy group, an alkenoxy group, an alkyl group, an aralkoxy group, an aryloxy group, an alkylamino group, an alkylthio group, or an aryl group;
B represents NR11 (wherein R11 represents a hydrogen, an alkyl group, an alkenyl group, an alkynyl group or an aryl groupl, oxygen, or sulfur ; and Y represents a group represented by
(wherein Y represents a hdrogen, an alkyl group, a cycloalkyl group, a halogenoalkyl group, or an aryl group ; F represents NH, oxygen, sulfur alkylamino, or NHCO groups ; R12 and R13, which may be same or different, each represents a hydrogen, HO-, HS-, an alkyl group, an alkylthio group, an alkylamino group, an alkenyl group, an alkynyl group, or an aryl group, q is 0 or 1 ; and r represents an integral number of 0-4), or H-B-Y is an amino acid in which a proper protective group is introduced or not introduced in the side chain and/or the α-carboxyl group, a peptide or protein in which a proper protective group is introduced or not introduced in the side chain and/or the terminal carboxyl group, or a glucide in which the hydroxyl group in the molecule is properly protected or not protected.
本发明的特点是通过使用由通式表示的锍盐组成的活性酯化剂合成通式表示的活性酯
使用由通式所代表的锍盐组成的活性酯化剂
并进一步将上述活性酯与通式 H-B-Y 所代表的亲核剂反应,生成通式 (W)d A-B-Y 所代表的酯或酰胺、
其中 A 代表-CO-、-SO2-、>PO-或>PS-基团;R 代表氢、烷基、卤素基团、硝基或烷氧基;R2 和 R3 可以相同或不同,各自代表烷基;X⊖ 代表卤素离子、高氯酸离子、氢硫酸离子、甲基硫酸离子和对甲苯磺酸离子等阴离子;对于 W 和 d、
当上述 A 为二价基团时,d 为 1,且 W 代表烷基、烯基、炔基、环烷基、被 1-3 个卤素原子取代的 C1-C5 烷基、基团
(其中 R4 和 R5 可以相同或不同,ead 代表氢、羟基、巯基、烷基或芳基;当 Q 为氧或硫时,U 为 0,Re 代表氢、烷基、芳基、环烷基、烯基、炔基或芳基;当 Q 为氮时,u 为 1,且 R6 和 R'6 可相同或不同,各自代表氢、烷基、烯基、炔基、芳基或芳烷基;且 k 代表 1-4 的整数)、烷氧基、环烷氧基、芳基、芳氧基、芳烷氧基,由以下各项代表的烷氧基
(其中 Rn 代表氢、卤素原子、烷基、烷氧基、烷硫基、烷基磺酰基、芳基或基团)。
R7 和 Rs 可以相同或不同,各自代表氢或烷基;和 m 代表 1-4 的整数)、异苯氧基基团、糠氧基基团、芴甲氧基基团或 R9-R10N- 基团(其中 R9 和 R10 可相同或不同,各自代表氢、烷基、烯基、炔基、芳基或芳烷基,或 R9 和 R10 可相互结合形成具有 3-6 个碳原子的环,当场合要求时,含有其他杂原子),当上述 A 特别是
W 可以是引入或未引入适当保护基团的氨基酸基团 在α-氨基基团和/或侧链中与 W-Cl- 一起引入,和/或一个基团或肽或蛋白质,以及
当上述 A 为三价基团时,d 为 2,在此情况下,两个 W(可以相同或不同)分别代表烷氧基、烯氧基、烷基、烷氧基、芳氧基、烷基氨基、烷硫基或芳基;
B 代表 NR11(其中 R11 代表氢、烷基、烯基、炔基或芳基)、氧或硫;以及 Y 代表下列基团
(其中 Y 代表氢、烷基、环烷基、卤代烷基或芳基;F 代表 NH、氧、硫烷基氨基或 NHCO 基团;R12 和 R13 可以相同或不同,各自代表氢、HO-、HS-、烷基、烷硫基、烷基氨基、烯基、炔基或芳基;q 为 0 或 1;和 r 代表 0-4 的整数),或 H-B-Y 是在侧链和(或)α-羧基中引入或未引入适当保护基团的氨基酸、在侧链和(或)末端羧基中引入或未引入适当保护基团的肽或蛋白质,或分子中羟基受到或未受到适当保护的葡萄糖苷。