Totally chemical synthesis of azasugars via thiazole intermediates. Stereodivergent routes to (-)-nojirimycin, (-)-mannojirimycin and their 3-deoxy derivatives from serine
作者:Alessandro Dondoni、Pedro Merino、Daniela Perrone
DOI:10.1016/s0040-4020(01)80389-6
日期:1993.4
The synthesis of the (-)-antipodes of the natural products nojirimycin (+)-1 and mannojirimycin (+)-2 has been carried out by stereocontrolled reduction of the thiazole ketone 7 as a common key intermediate. This ketone was in turn obtained from the L-serine derived aldehyde 3 by two convergent routes involving carbonylolefination and dihydroxylation processes. Moreover, 3-deoxy derivatives of (-)-1
( - ) -的天然产物的对映体野尻霉素(+) -的合成1和mannojirimycin(+) - 2已经由立体控制还原噻唑酮的情况下进行7作为公共关键中间体。该酮又通过涉及羰基烯烃化和二羟基化过程的两种收敛途径从L-丝氨酸衍生的醛3获得。此外,已经由3和2-乙酰基噻唑的烯醇锂制备了(-)- 1和(-)- 2的3-脱氧衍生物,随后立体控制还原了所得的羟醛。