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Danshensu ((¡À)-DSS) ÌØ±ðÊǺóÃæµÄ ((¡À)-DSS)´ú±íɶ°¡£¿ (¡À)-¦Â-(3,4-dihydroxyphenyl) lactic acid ((¡À)-DSS) (¡À)-IDHP [(¡À)-isopropyl 2-hydroxy-3-(3,4-dihydroxyphenyl)-propanoate] and (¡À)-DBZ [(¡À)-bornyl 2-hydroxy-3-(3,4-dihydroxyphenyl)propanoate]. Clemmensen reduction of 8 with zinc amalgam in boiling 3 M hydrochloric acid gave the racemic DSS in fair yield in the small-scale trial. 3,4-Dihydroxy Phenylpyruvic Acid 2-(Acetylamino)-3-[3,4-bis(acetyloxy)-phenyl]-(2Z)-2-propenoic acid 2-Hydroxy-3-(3,4-dihydroxyphenyl)-acrylic acid ÕâЩÓÖ´ú±íɶ£¿£¿Ôõô·Ò룿£¿MS (−ESI, negative mode) m/z: 195.0 [M − 1]. 1H NMR (DMSO-d6, 600 MHz): ¦Ä 12.91 (s, 1H), 9.07 (s, 1H), 8.96 (s, 1H), 8.77 (s, 1H),7.37 (s, 1H), 6.96 (dd, J = 6.0 Hz, 1H), 6.71 (d, J = 6.0 Hz, 1H), 6.27 (s, 1H). 13C NMR (DMSO-d6, 600 MHz): ¦Ä 166.3, 145.2, 144.8, 139.1, 126.4, 121.7, 116.5, 115.4, 110.8. IR (KBr, cm−1): 3383, 3239, 2852, 1692, 1658, 1596, 1523, 1447, 1384, 1333, 1272, 1245, 1161, 1121, 922, 886, 864, 810, 771, 717. |
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samule1978
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samule1978
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