Rhodium-catalyzed Dehydroborylation of Styrenes with Naphthalene-1,8-diaminatoborane [(dan)BH]: New Synthesis of Masked β-Borylstyrenes as New Phenylene–Vinylene Cross-coupling Modules
作者:Noriyuki Iwadate、Michinori Suginome
DOI:10.1246/cl.2010.558
日期:2010.6.5
Styrene derivatives underwent dehydroborylation with naphthalene-1,8-diaminatoborane [(dan)BH] in the presence of a cationic rhodium complex, giving β-borylstyrene derivatives in good yields. Thus prepared β-borylstyrenes bearing a chlorine or B(pin) group on their aromatic rings were utilized for the synthesis of highly conjugated molecules through stepwise cross-coupling, taking advantage of the dan group as an effective protective group for a boronyl group.
Synthesis of B-Protected β-Styrylboronic Acids via Iridium-Catalyzed Hydroboration of Alkynes with 1,8-Naphthalenediaminatoborane Leading to Iterative Synthesis of Oligo(phenylenevinylene)s
作者:Noriyuki Iwadate、Michinori Suginome
DOI:10.1021/ol9003096
日期:2009.5.7
group. The masked alkenylboronic acids thus obtained from alkynes bearing halo-substituted aryl groups served as new coupling modules in an iterative Suzuki−Miyaura cross-couplingreaction for the synthesis of oligo(phenylenevinylene)s.
NHC-copper-thiophene-2-carboxylate complex for the hydroboration of terminal alkynes
作者:Won Jun Jang、Byung-Nam Kang、Ji Hun Lee、Yoon Mi Choi、Chong-Hyeak Kim、Jaesook Yun
DOI:10.1039/c9ob00839j
日期:——
been prepared for the stereoselective hydroboration of terminal alkynes using pinacolborane (HBpin) or 1,8-naphthalenediaminatoborane (HBdan). The newly synthesized complex can be directly activated by hydroboranes without a cocatalyst such as a base, and exhibits high reactivity for the hydroboration of alkynes under mild conditions. A gram-scale hydroboration of terminal phenylacetylene demonstrated
Asymmetric Synthesis of Borylalkanes via Copper-Catalyzed Enantioselective Hydroallylation
作者:Jung Tae Han、Won Jun Jang、Namhyeon Kim、Jaesook Yun
DOI:10.1021/jacs.6b11229
日期:2016.11.23
through a copper-catalyzed regio- and enantioselective hydroallylation of alkenyl boronates and boramides employing hydrosilanes and allylic phosphates. In the presence of a copper catalyst with a chiral Walphos ligand, a range of alkenylboron compounds with an aryl, heteroaryl, or alkyl substituent produced secondary homoallylic alkylboron compounds in good yields and with high enantioselectivities up to
通过使用氢硅烷和烯丙基磷酸酯对烯基硼酸酯和硼酰胺进行铜催化的区域和对映选择性水解烯丙基化反应,实现了一种制备富含对映体的仲硼烷烃的有效合成方法。在具有手性 Walphos 配体的铜催化剂存在下,一系列具有芳基、杂芳基或烷基取代基的链烯基硼化合物以良好的收率和高达 99% ee 的高对映选择性生成二级均烯丙基烷基硼化合物。在 (S)-massoialactone 的有效合成中证明了所得烷基硼酸酯的效用。