bioconversion into nortiliacorinine A. Parallel feedings of (+)-(S)- and (-)-(R)-N-methyl-coclaurines and (-)-(S)-, and ( + )-(R)-coclaurines revealed that the stereo-specificity is maintained in the biosynthesis of nortiliacorinine A from 1-benzylisoquinoline precursors and established ‘S,S’-configuration at the two asymmetric centres in nortiliacorinine A.
(±)-norcoclaurine,(±)-coclaurine,(±)-N- methylcoclaurine和脱氢-N-methylcoclaurine掺入nortiliacorinine甲在Tiliacora总状colebr已经研究和(±)-coclaurine证明的具体利用。有证据支持氧化性两个coclaurine单元的二聚化,得到与(±)-N- methylcoclaurine和(±)nortiliacorinine A.实验- [1- 3 H,N- 14 CH 3] N-甲基
鸟嘌呤确定只有一个N-甲基
鸟嘌呤单元专门用于构成在苄基部分具有
酚羟基的碱基的“一半”,并进一步证明在
1-苄基异喹啉前体的不对称中心具有H原子被保留在
生物转化成nortiliacorinine A.双标记实验用(±) - [1- 3 H,6,0- 14 CH 3 ]的N- methylcoclaurine表明