New optically active pyrazoles: Syntheses and the structural characterization of menthopyrazole analogues
作者:Choji Kashima、Yohei Miwa、Saori Shibata、Hiroyuki Nakazono
DOI:10.1002/jhet.5570390618
日期:2002.11
New chiral pyrazoles, (4R,7R)-4-methyl-7-isopropyl-3-phenyl- (3-phenyliso menthopyrazole cis-1), (4R,7S)-4-methyl-7-isopropyl- (1-menthopyrazole; trans-2), (4R,7R)-4-isopropyl-7-methyl- (iso carvomen-thopyrazole, cis-3) and (4R,7S)-4-isopropyl-7-methyl-4,5,6,7-tetrahydro-1H-indazole (carvomenthopyra-zole, trans-3) were prepared. The diastereomeric pairs of these 1–3 were structurally characterized
新的手性吡唑,(4 R,7 R)-4-甲基-7-异丙基-3-苯基-(3-苯基异薄荷基吡唑顺式-1),(4 R,7 S)-4-甲基-7-异丙基-(1-薄荷脑吡唑;反式-2),(4 R,7 R)-4-异丙基-7-甲基-(异香豆素-吡唑,顺-3)和(4 R,7 S)-4-异丙基- 7-甲基-4,5,6,7-四氢- 1 H ^ -吲唑(carvomenthopyra唑,反式-3)中制备。这些1-3的非对映异构体对通过NMR光谱进行结构表征。1-3结构的细微差别应能诱导出对手性助剂或手性催化剂的有用作用。