Asymmetric Hydrogenation of β-Secondary Amino Ketones Catalyzed by a Ruthenocenyl Phosphino-oxazoline-ruthenium Complex (RuPHOX-Ru): the Synthesis of γ-Secondary Amino Alcohols
hydrogenation of β-secondary aminoketones, directly affording the corresponding chiral γ-secondary aminoalcohols in up to 99% yield and with 99% ee. Reaction with β-(benzylamino)-1-phenylpropan-1-one could be performed on a gram-scale with a relatively low catalyst loading (up to 2000 S/C). The resulting hydrogenated product could be used for the synthesis of synthetically useful compounds.
钌烯基膦基-恶唑啉-钌络合物(RuPHOX-Ru)成功应用于β-仲氨基酮的不对称加氢反应,直接制得相应的手性γ-仲氨基醇,收率高达99%,ee为99%。与β-(苄氨基)-1-苯基丙烷-1-酮的反应可以以克为单位进行,催化剂的负载相对较低(最高2000 S / C)。所得的氢化产物可用于合成有用的化合物。
Synthesis of some novel 2-phenylpyridazino[4,5-<i>b</i>][1,5]thiazepines
Synthesis of some derivatives of the pyridazino[4,5-b][1,5]thiazepine ring system is reported. Thus, 5-benzyl-8-methyl-2-phenyl-2,3.4,5-tetrahydro-5H-pyridazino[4,5-b][1,5]thiazepin-9(8H)-one (5) was prepared by an intramolecular S-alkylation reaction, whereas the thiazepine ring of sulfone analogue 21, and that of the novel tricyclic pyrrolidino fused ring system 22 was elaborated by an intramolecular
报道了哒嗪并[4,5- b ] [1,5]噻氮平环系统的一些衍生物的合成。因此,5-苄基-8-甲基-2-苯基-2,3.4,5-四氢-5 H-哒嗪[4,5- b ] [1,5]噻嗪酮-9(8 H)-一(5)通过分子内的S-烷基化反应制备了环戊二烯,而通过分子内的C-烷基化反应制备了砜类似物21的硫氮平环和新型三环吡咯烷基稠合环系统22的噻唑烷环。还讨论了双环吡啶并噻嗪稠合的哒嗪系统的意外形成。
Sahasrabudhe, S. D.; Tilak, B. D., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1984, vol. 23, # 10, p. 914 - 917