Derivatives of α,α,α′,α′-Tetraaryl-2,2-dimethyl-1,3-dioxolan-4,5-dimethanol (TADDOL) containing nitrogen, sulfur, and phosphorus atoms. New ligands and auxiliaries for enantioselective reactions.
作者:Dieter Seebach、Michiya Hayakawa、Jun-ichi Sakaki、W.Bernd Schweizer
DOI:10.1016/s0040-4020(01)80529-9
日期:1993.2
(5c–5f), as well as a bis(trifluoroacetamide) (5g). Cyclization of the aminoalcohol (4c) produces a bicyclic system (7), containing a pyrrolidine ring (structure determination by X-ray diffraction). - The new chiral compounds containing nitrogen and phosphorus atoms might be useful ligands and auxiliaries for enantioselective syntheses.
α,α,α',α'-四芳基-2,2-二甲基-1,3-二氧戊环-4,5-二甲醇通过与Cl 2 PR和Cl 2反应转化为双环亚磷酸酯和亚膦酸酯(2a-2e)POR衍生物。-母体TADDOL的一个或两个OH基团可被Cl(→,4a,5a)取代,卤化物依次被叠氮化物(→ 4b,5b),硫氰化物(→ 6)或硫化物(→ 8)取代。将叠氮基还原为NH 2和N-烷基化或酰化可提供多种氨基醇(4c–4f)和二胺(5c–5f),以及双(三氟乙酰胺)(5g)。氨基醇(4c)的环化产生包含吡咯烷环的双环系统(7)(通过X射线衍射确定结构)。-含有氮和磷原子的新手性化合物可能是对映选择性合成的有用配体和助剂。