PROCESS FOR PREPARATION OF 6-[3-(1-ADMANTYL)-4-METHOXYPHENYL]-2-NAPHTOIC ACID.
申请人:Kalvinsh Ivars
公开号:US20100160677A1
公开(公告)日:2010-06-24
A process for preparation of 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid from 2-(1-adamantyl)-4-bromanisolee is disclosed, based on transformation of 2-(1-adamantyl)-4-bromanisole into a Grignard's reagent by using metallic magnesium, anhydrous lithium chloride and dibromoethane followed by transmetallation with borates to 3-(adamantyl)-4-methoxyphenylboronic acid, which is converted into 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid esters by Suzuki-Miyaura cross-coupling reaction with alkyl-6-halonaftoates catalyzed by Pd [0] or Pd/phosphine ligands and followed by basic hydrolysis in ethylene glycol or 1,2-propanediol of ester thus obtained into 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid.
揭示了一种从2-(1-金刚烷基)-4-溴苯甲醚制备6-[3-(1-金刚烷基)-4-甲氧基苯基]-2-萘甲酸的方法,基于将2-(1-金刚烷基)-4-溴苯甲醚转化为格氏试剂,使用金属镁、无水氯化锂和二溴乙烷进行转化,随后通过与硼酸盐的转金属化反应得到3-(金刚烷基)-4-甲氧基苯基硼酸,再通过Suzuki-Miyaura交叉偶联反应与Pd [0]或Pd/膦配体催化的烷基-6-卤代萘酸酯反应,最后在乙二醇或1,2-丙二醇中进行酯的碱性水解,得到6-[3-(1-金刚烷基)-4-甲氧基苯基]-2-萘甲酸。