Sulfonium compounds, as well as process for producing active esters and amides used for the production of amides
申请人:SANSHIN KAGAKU KOGYO CO., LTD.
公开号:EP0331988A1
公开(公告)日:1989-09-13
In the present invention an amide represented by the general formula:
is produced using a sulfonium salt represented by the general formula:
as the starting material, to synthesizing a novel compound, i.e., an active ester represented by the general formula:
and further reacting the active ester with a nucleophilic agent represented by the general formula: H-B-Y wherein R1 represents a hydrogen, an alkyl group or a halogen 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 hydrogen sulfuric acid ion, a methylsulfuric acid ion, and a p-toluenesulfonic acid ion; W represents an alkyl group, alkoxy group
group, in which R4. represents a halogen, a hydrogen or a methoxy or a Ci - C5 alkyl group substituted with 1 - 3 halogen atoms, an aryl group or a fluorenylmethoxy group, or represents, together with W- C -, an amino acid, a peptide, or a protein group, in which the terminal amino group and the side chain group of the amino acid has or has not a protective group, B represents a substituted or not-substituted imino group, Y represents an organic group or B and Y join together to represent a heterocyclic amine. Alternatively H-BY represents an amino acid in which a proper protective group is or is not introduced into a-carboxyl group and/or side chain, or a peptide or protein in which a proper protective group is or is not introduced into the terminal carboxyl group and/or side chain.
在本发明中,使用通式为
代表的酰胺作为起始原料,使用通式:
作为起始原料,合成一种新型化合物,即通式: 所代表的活性酯:
并进一步将该活性酯与通式: 所代表的亲核剂反应:H-B-Y 其中 R1 代表氢、烷基或卤素基团;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、甲硫 酸离子和对甲苯磺酸离子等类型的阴离子;W 代表烷基、烷氧基和烷烃基团。
其中 R4. 代表卤素、氢或甲氧基或被 1 - 3 个卤素原子取代的 Ci - C5 烷基、芳基或芴甲氧基,或与 W- C - 一起代表氨基酸、肽或蛋白质基团,其中 氨基酸的末端氨基和侧链基团具有或不具有保护基团;B 代表取代或未取代的亚氨基;Y 代表有机基团或 B 和 Y 连接在一起代表杂环胺。或者,H-BY 代表在羧基和/或侧链中引入或未引入适当保护基团的氨基酸,或在末端羧基和/或侧链中引入或未引入适当保护基团的肽或蛋白质。