杂环亚磺酸盐是钯催化与芳基和杂芳基卤化物偶联反应的有效试剂,通常可提供高产率的目标联芳基。然而,复杂杂环亚磺酸盐的制备和纯化可能存在问题。此外,亚磺酸盐官能团不能耐受大多数合成转化,使这些试剂不适合多步加工。在这里,我们表明杂环烯丙基砜可以作为潜在的亚磺酸盐试剂,并且当用 Pd(0) 催化剂和芳基卤化物处理时,会发生脱烯丙基化,然后进行有效的脱亚磺酰交叉偶联。使用多种互补路线可以方便地制备范围广泛的烯丙基杂芳基砜,并且证明是与各种芳基和杂芳基卤化物的有效偶联伙伴。我们证明烯丙基砜官能团可以耐受一系列标准合成转化,包括正交 C 和 N 偶联反应,允许多步加工。烯丙基砜成功地与多种医学相关底物偶联,证明了它们在要求严格的交叉偶联转化中的适用性。此外,药物克唑替尼和依托考昔是使用烯丙基杂芳基砜偶联伙伴制备的,进一步证明了这些新试剂的实用性。证明它们在要求苛刻的交叉耦合转换中的适用性。此外,药物克
P,N,N-Pincer nickel-catalyzed cross-coupling of aryl fluorides and chlorides
作者:Dan Wu、Zhong-Xia Wang
DOI:10.1039/c4ob01041h
日期:——
were synthesized and their catalysis toward the Kumada or Negishi cross-coupling reaction of aryl fluorides and chlorides was evaluated. Complex 3a effectively catalyzes the cross-coupling of (hetero)aryl fluorides with aryl Grignard reagents at room temperature. Complex 3a also catalyzes the cross-coupling of (hetero)arylchlorides and arylzinc reagents at 80 °C with low catalyst loadings and good
P,N,N-镍镍配合物[Ni(Cl)N(2-R 2 PC 6 H 4)(2'-Me 2 NC 6 H 4)}](R = Ph,3a ; R = Pr i,合成了3b; R = Cy,3c),并评估了它们对芳基氟化物和氯化物的Kumada或Negishi交叉偶联反应的催化作用。在室温下,配合物3a有效催化(杂)芳基氟化物与芳基格氏试剂的交叉偶联。复杂3a 它还在低催化剂负载和良好的官能团相容性下,于80°C催化(杂)芳基氯和芳基锌试剂的交叉偶联。
Arylation, Vinylation, and Alkynylation of Electron-Deficient (Hetero)arenes Using Iodonium Salts
作者:Chuan Liu、Qiu Wang
DOI:10.1021/acs.orglett.6b02550
日期:2016.10.7
Arylation, vinylation, and alkynylation of electron-deficient arenes and heteroarenes have been achieved by chemoselective C–H zincation followed by copper-catalyzed coupling reactions using iodoniumsalts. This approach offers a direct and general access to a wide scope of (hetero)biaryls as well as alkenylated and alkynylated heteroarenes under mild conditions. It is particularly useful and valuable
Synthesis of functionally substituted unsymmetrical biaryls via a novel double metal catalyzed coupling reaction
作者:Joseph A. Miller、Robert P. Farrell
DOI:10.1016/s0040-4039(98)01587-1
日期:1998.10
Unsymmetrical biaryls containing “reactive” functional groups (e.g., nitrile or ester groups) can be synthesized in an efficient manner by the direct Ni- or Pd-catalyzed coupling of aryl halides (X = Cl, Br, I) with aryl Grignard (or -lithium) reagents, provided that a catalytic amount of a Zn or Cd salt is also present.