Preparation, structure, and optical properties of chiral sulfoxides and disulfoxide with a trithiole ring
作者:Takeshi Kimura、Masayuki Hanzawa、Satoshi Ogawa、Ryu Sato、Takayoshi Fujii、Yasushi Kawai
DOI:10.1002/hc.10104
日期:——
2,3]trithiole 5-oxide (3) and 4,9-diethyl[1,4]dithiino[5,6-f]benzo[1,2,3]trithiole 5,8-dioxide (4) were obtained by the asymmetric oxidation of 6,11-diethyl[1,4]dithiino[5,6-h]benzo[1,2,3,4,5]pentathiepin (1). The reaction was accompanied by desulfurization and ring-contraction reactions of the pentathiepin ring. Similarly, optically active 4,8-diethyl[1,3]dithiolo[4,5-f]benzo[1,2,3]trithiole 5-oxide
光学活性 4,9-二乙基[1,4]-二硫代[5,6-f]苯并[1,2,3]三硫醇5-氧化物(3)和4,9-二乙基[1,4]二硫代[5] 6,11-二乙基[1,4]二硫代[5,6-h]苯并[1]不对称氧化得到,6-f]苯并[1,2,3]三硫醇5,8-二氧化物(4) ,2,3,4,5]戊硫菌素 (1)。该反应伴随着五硫杂环的脱硫和缩环反应。类似地,通过 6,10-二乙基的类似不对称氧化产生光学活性 4,8-二乙基 [1,3] 二硫醇 [4,5-f] 苯并 [1,2,3] 三硫醇 5-氧化物 (7) [1,3]二硫并[4,5-h]苯并[1,2,3,4,5]pentathiepin (2)。3、4 和 7 的比旋光度在氯仿中测量,其光学纯度通过 1H NMR 和位移试剂 [Eu(hfc)3] 进行验证。4 和 7 的结构通过使用 Cu Kα 辐射的 X 射线晶体学确定,并且基于 Flack 参数检查亚磺酰基的绝对构型,结果显示