中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (2R*,3S*)-2,3-bis((benzyloxy)methyl)oxirane | 68973-05-7 | C18H20O3 | 284.355 |
(S)-苄氧甲基环氧乙烷 | (S)-benzyl glycidyl ether | 16495-13-9 | C10H12O2 | 164.204 |
—— | (S)-1,4-bis(benzyloxy)-2-(methoxymethoxy)butane | 131068-45-6 | C20H26O4 | 330.424 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (R)-1,4-bis(benzyloxy)but-2-oxyamine | 114778-27-7 | C18H23NO3 | 301.386 |
Various alkenyl 2-acetylamino-2-deoxy-β-D-glucopyranosides have been subjected to the Sharpless asymmetric dihydroxylation protocol to yield the corresponding diols, albeit with somewhat disappointing stereoselectivity. An alternative, more traditional approach has yielded the optically pure epoxyalkyl 2-acetylamino-2-deoxy-β-D-glucopyranosides as putative inhibitors of chitinases. As well, an epoxypropyl chito-bioside and -trioside have been prepared, each as mixtures of two diastereoisomers.
A nuclearity‐dependent enantiodivergent epoxide opening reaction has been developed, in which both antipodes of chiral alcohol products are selectively accessed by mononuclear (salen)TiIII complex and its self‐assembled oxygen‐bridged dinuclear counterparts within the same stereogenic ligand scaffold. Kinetic studies based on the Eyring equation revealed an enthalpy‐controlled enantio‐differentiation mode in mononuclear catalysis, whereas an entropy‐controlled one in dinuclear catalysis. DFT calculations outline the origin of the enantiocontrol of the mononuclear catalysis and indicate the actual catalyst species in the dinuclear catalytic system. The mechanistic insights may shed a light on a strategy for stereoswichable asymmetric catalysis utilizing nuclearity‐distinct transition‐metal complexes.