以3,4-二羟基苯甲醛为原料,经开环、Knoevenagel缩合、水解和Clemmensen还原反应合成了丹参素(5);5与(R)-2-胺基-4-苯基丁酸乙酯在DCC/DMAP作用下,脱去一分子水合成了β-(3,4-二羟基苯基)-α-羟基-N-[(R)-3-苯基-1-乙氧酰基丙基]丙酰胺(8)。8的结构经^1H NMR,IR和MS表征。
Banshensu (5) was obtained from 3,4-dihydroxybenzaldehyde by the reactions of ring- opening reaction, Knoevenagel condensation, hydrolization and Clemmensen reduction. β-(3,4-dihydroxyphenyl) -α-hydrox-N- [ (R) - (3-phenyl-1 -ethyloxyformyl) propyl ] propanamide (8) was synthe- sized by the reaction of 5 with (R)-2-amino-4-phenyl ethyl butyrate in DCC/DMAP. The structure of 8 was confirmed by ^1H NMR, IR and MS.