SEKINE, YASUO;CREVELING, CYRUS;BELL, MAUREEN;BROSSI, ARNOLD, HELV. CHIM. ACTA, 73,(1990) N, C. 426-432
作者:SEKINE, YASUO、CREVELING, CYRUS、BELL, MAUREEN、BROSSI, ARNOLD
DOI:——
日期:——
Mammalian Alkaloids:<i>O</i>-Methylation of (±)-Norcoclaurine-1-carboxylic Acid and Related Isoquinolines Including (<i>S</i>)- and (<i>R</i>)-Norcoclaurine with<sup>14</sup>C-Labeled<i>S</i>-Adenosyl-<scp>L</scp>-Methionine in Presence of Mammalian Catechol<i>O</i>-Methyltransferase
observed with (−)-(S)- and (+)-(R)-norcoclaurine (2a and 2b, resp.), affording 80% of 6-O-methylated isoquinoline 12 and 20% of the 7-O-methylated isomer 11 from 2a, and the reversed proportion of 12 and 11 from 2b. Synthesis of the reference amino acid 8 was achieved by Pictet-Spenglercondensation of O-benzyl-protected dopamine 17 with benzyl-protected keto acid 20 ( 21) followed by methylation with