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    • 3. 发明授权
    • Production of intermediates for enzyme inhibitors
    • 生产酶抑制剂的中间体
    • US4325877A
    • 1982-04-20
    • US160057
    • 1980-06-16
    • Brian W. MetcalfJerry L. Adams
    • Brian W. MetcalfJerry L. Adams
    • C07C69/66C07C69/716C07C69/74C07C117/08
    • C07C247/00C07C323/00
    • 5-Amino-4-oxo-pentanoic acids of the formula ##STR1## wherein R is CF.sub.3, CHF.sub.2 or CH.sub.2 F; R.sub.1 is H or akyl of 1-4 carbon atoms; and R.sub.2 is H or alkyl or 1-4 carbon atoms or benzyl, which are intermediates to ACE inhibitors or elastase inhibitors, are produced by reacting a 1-(methylthio)-1-methylsulfinyl)-2-R.sub.1 -ethylmetal with an ester of a 3-R-acrylic acid; optionally R.sub.2 -alkylating the thus-produced ester enolate anion of 4-(methylsulfinyl)-4-(methylthio)-5-R.sub.1 R-pentanoic acid followed by splitting off of methylsulfinic acid; reacting the thus-produced 2-R.sub.2 -5-R.sub.1 -4-(methylthio)-3-R-4-pentenoic acid ester with a source of Br.sup.+ to produce a 5-bromo-substituted acid or ester thereof otherwise corresponding to the desired 5-amino-4-oxo-pentanoic acid; and replacing the bromine atom with an amino group, e.g., via the corresponding 5-azido- and 5-N-acylamino- compounds, with hydrolysis of the ester group, if still remaining.
    • 其中R是CF 3,CHF 2或CH 2 F的5-氨基-4-氧代 - 戊酸; R1是H或1-4个碳原子的烷基; R2是H或烷基或1-4个碳原子,或作为ACE抑制剂或弹性蛋白酶抑制剂的中间体的苄基是通过使1-(甲硫基)-1-甲基亚磺酰基)-2-R 1 - 乙基金属与 3-R-丙烯酸; 任选地将4-(甲基亚磺酰基)-4-(甲硫基)-5-R1R-戊酸由此产生的酯烯醇化物阴离子R2-烷基化,随后分解出甲基亚磺酸; 使由此产生的2-R2-5-R1-4-(甲硫基)-3-R-4-戊烯酸酯与Br +源反应,产生5-溴取代的酸或酯,否则对应于所需的 5-氨基-4-氧代 - 戊酸; 并且如果仍然存在,则通过相应的5-叠氮基 - 和5-N-酰基氨基化合物用氨基取代溴原子,同时酯基的水解。