中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 1,6-anhydro-3-deoxy-2-O-pivaloyl-3-p-toluenesulfonamido-β-D-altropyranose | 163356-94-3 | C18H25NO7S | 399.465 |
Various new chiral building blocks could easily be prepared from optically pure cis and trans ethyl 3-(1′,3′- dioxolan-4′-yl)aziridine-2-carboxylates. A stereochemically pure 1,3-dioxolan in the allyl position of an α-bromoacrylate induced a high (3R*,4′S*) selectivity in the Michael addition with an amine. After oxygen at the inducing centre was exchanged with nitrogen bearing a bulky substituent, the directing influence of this new group was examined. Solvent effects influencing the cis/trans ratio of aziridine formation are discussed.