Nucleophilic addition to coordinated allyl ligands. Heteroatom nucleophiles with cationic molybdenum complexes
作者:W.E. Vanarsdale、R.E.K. Winter、J.K. Kochi
DOI:10.1016/0022-328x(85)80337-5
日期:1985.11
sulfide was also converted stereospecifically to a single isomeric sulfoxide with m-chloroperbenzoic acid. Such a chiral oxidation of a sulfide to a sulfoxide is compared with the rather unselective sulfoxidation of the free phenyl 3-cyclooctenyl sulfide by the same reagent. The stereospecificity is analyzed in terms of steric features inherent of allyl sulfides coordinated to an optically active metal center
在加入异阴离子(甲醇,氢化物,alkylnitronate和硫醇盐)进行一系列的πallylmolybdenum至η相关阳离子的5 -C 5 H ^ 5的Mo(CO)(NO)(η 3 -烯丙基)+了检查。在每种情况下,都分离了在配位烯丙基基团末端的亲核攻击产生的加合物。发现将硫酚盐添加到环辛烯基类似物中,以高产率仅产生一种立体异构体。协调苯基3-环辛烯基硫化物也立体有择转化成具有单一的异构体亚砜米-氯过苯甲酸。将这种硫化物手性氧化为亚砜与通过相同试剂对游离苯基3-环辛烯基硫化物的非选择性硫氧化进行了比较。根据与光学活性金属中心配位的烯丙基硫化物固有的空间特征来分析立体特异性。
Synthesis of vinyl sulfones. 23. Addition of organometallic reagents to cyclooctenyl phenyl sulfones
作者:Steven A. Hardinger、P. L. Fuchs
DOI:10.1021/jo00389a019
日期:1987.6
HARDINGER S. A.; FUCHS P. L., J. ORG. CHEM., 52,(1987) N 13, 2739-2749
作者:HARDINGER S. A.、 FUCHS P. L.
DOI:——
日期:——
Highly Selective Sulfoxidation of Allylic and Vinylic Sulfides by Hydrogen Peroxide Using a Flavin as Catalyst
作者:Auri A. Lindén、Lars Krüger、Jan-E. Bäckvall
DOI:10.1021/jo034273z
日期:2003.7.1
sulfone was detected). No epoxidation of double bonds or interference with other functional groups was observed under the reaction conditions. The general applicability was demonstrated by the selective oxidation of various allylic and vinylic sulfides having different electronic properties. A number of functionalities including hydroxy, acetoxy, amino, silyloxy, and formyl groups are tolerated under these
Ionic Liquid as Catalyst and Reaction Medium: A Simple, Convenient and Green Procedure for the Synthesis of Thioethers, Thioesters and Dithianes using an Inexpensive Ionic Liquid, [pmIm]Br
作者:Brindaban C. Ranu、Ranjan Jana
DOI:10.1002/adsc.200505122
日期:2005.11
room temperature ionicliquid, 1-pentyl-3-methylimidazolium bromide, [pmIm]Br efficiently catalyzes the reaction of alkyl halides or acyl halides with thiols without any solvent at room temperature leading to the synthesis of thioethers and thioesters in high yields. This reaction has also been extended for the preparation of dithianes and transthioetherification. The ionicliquid is recovered and