Synthesis, Enantiomeric Conformations, and Stereodynamics of Aromaticortho-Substituted Disulfones
作者:Jérôme Lacour、David Monchaud、Jiri Mareda、France Favarger、Gérald Bernardinelli
DOI:10.1002/hlca.200390020
日期:2003.1
diiodide precursors by CuI-mediated reaction with sodium sulfinate salts (DMF, 110°). The sulfonyl substituents adopt in solution and in the solid state two enantiomeric conformations (λ and δ) as evidenced by 31P- and 1H-NMR data of the chiral D3-symmetric tris4,5-bis[(4-methylphenyl)sulfonyl]benzene-1,2-diolato(2−)-κO,κO′}phosphate(v) anion (3a) and 1,2-bis(camphor-10-sulfonyl)-4,5-dimethoxybenzene ((=1
通过亚磺酸钠(DMF,110°)与Cu I介导的反应,可以容易地从二碘化物前体获得芳族邻二砜衍生物。磺酰基取代基在溶液中和在固态下采用两个对映体构型(λ和δ),如手性D 3对称三4,5-双[(4-甲基苯基)]的31 P-和1 H-NMR数据所证明。)磺酰基]苯-1,2-二醇基(2-)- κO,κO '}磷酸(v)阴离子(3a)和1,2-双(樟脑10磺酰基)-4,5-二甲氧基苯((= 1,2-bis [((1 S,4 R)-7,7-二甲基-2-氧代双环[2.2.1]庚-1-基]甲基}磺酰基} -4,5-二甲氧基苯; 6c)。1,2-二甲氧基-4,5-双(甲基磺酰基)苯(6a)和1,2-二甲氧基-4,5-双(4-甲基苯基)磺酰基]苯(6b)的X射线结构分析固态时,磺酰基的优选手性取向。在110℃的温度范围内在其1 H-NMR中检测到6c的动态构象异构体,相应的自由能为19.8kcal·mol