Lithium-Catalyzed Thiol Alkylation with Tertiary and Secondary Alcohols: Synthesis of 3-Sulfanyl-Oxetanes as Bioisosteres
作者:Rosemary A. Croft、James J. Mousseau、Chulho Choi、James A. Bull
DOI:10.1002/chem.201705576
日期:2018.1.19
inexpensive Li catalyst enables chemoselective C-OH activation and thiol alkylation. Oxetane sulfides are formed from various thiols providing novel motifs in new chemical space and specifically as bioisosteres for thioesters due to their similar shape and electronic properties. Under the same conditions, various π-activated secondary and tertiary alcohols are also successful. Derivatization of the oxetane
3-硫烷基-氧杂环丁烷被认为是硫酯或苯硫醚的有前途的新型生物电子等排替代品。一种温和且廉价的 Li 催化剂以 oxetan-3-ols 为原料,能够实现化学选择性 C-OH 活化和硫醇烷基化。氧杂环丁烷硫化物由各种硫醇形成,在新的化学空间中提供新颖的基序,并且由于其相似的形状和电子特性,特别是作为硫酯的生物等排体。在相同条件下,各种π活化的仲醇和叔醇也获得了成功。氧杂环丁烷硫化物连接体的衍生化提供了更多新颖的氧杂环丁烷类别和结构单元。氧杂环丁烷化合物与选定的羰基和亚甲基类似物的关键物理化学性质的比较表明,这些基序适合纳入药物发现工作。
Sulfonium ylide formation and subsequent C S bond cleavage of aromatic isopropyl sulfide catalyzed by hemin in aqueous solvent
作者:Xiaojing Yan、Chang Li、Xiaofei Xu、Quan He、Xiaoyong Zhao、Yuanjiang Pan
DOI:10.1016/j.tet.2019.04.035
日期:2019.6
Heme is an abundant and widely existed cofactor for a variety of metalloenzymes, whose broader use is generally impeded by its high instability and poor solubility. Here we report an environment-benign and efficient strategy for the sulfonium ylide formation and subsequent CS bondcleavage of aromatic isopropyl sulfides, which was catalyzed by hemin in assistance of Triton X-100. This aqueous catalytic
Gold(I)-Mediated Hydrothiolation of Conjugated Olefins
作者:Chuan He、Chad Brouwer、Ronald Rahaman
DOI:10.1055/s-2007-984519
日期:2007.7
Thiol additions to conjugated olefins were catalyzed by Ph 3 PAuBF 4 with excellent yields at room temperature. A variety of functionalized thiols, with both electron-donating and electron-withdrawing substituents, are compatible with this system. Hydrothiolations of 1,3-cyclohexadiene were also achieved in similar yields at 50 °C.
Ph 3 PAuBF 4 催化硫醇加成到共轭烯烃,在室温下产率极好。各种具有给电子和吸电子取代基的官能化硫醇都与该系统兼容。1,3-环己二烯的氢硫醇化也在 50 °C 下以相似的产率实现。
Regioselective Cobalt-Catalyzed Addition of Sulfides to Unactivated Alkenes
作者:Vinay Girijavallabhan、Carmen Alvarez、F. George Njoroge
DOI:10.1021/jo201016z
日期:2011.8.5
A novel method to synthesize tertiary alkyl/arylsulfides in a mild and regioselective manner from unactivated alkenes using cobalt catalysis is described. The methodology is compatible with sensitive functionalities and is successful with several different types of alkenes and sulfides.
Iodine-catalyzed addition of aromatic mercaptans to indene
作者:Zubaidha K. Pudukulathan、Anjaneyulu Kasa
DOI:10.1080/17415993.2012.660941
日期:2012.4.1
Molecular iodine catalysis of additions of various substituted thiophenols to indene to afford the corresponding sulfides in good yields under mild conditions is reported. The regioselectivity of addition can be fine-tuned by modifying the reaction conditions, and the addition can also be effected under solvent-free conditions.[GRAPHICS].