Catalytic One-Pot Synthesis of Trisubstituted Allenes from Terminal Alkynes and Ketones
作者:Qi Liu、Xinjun Tang、Yujuan Cai、Shengming Ma
DOI:10.1021/acs.orglett.7b02443
日期:2017.10.6
one-pot synthesis of trisubstituted allenesfrom readily available terminal alkynes and ketones is realized. A wide range of trisubstituted allenes may be synthesized efficiently via this method. Preliminary mechanistic studies revealed that CuI and Ti(OEt)4 are in charge of the formation of propargylic amine, while ZnBr2 is responsible for the transformation from propargylic amine to allene.
Intermolecular rhodium catalyzed hydroacylation of allenes: the regioselective synthesis of β,γ-unsaturated ketones
作者:Helen E. Randell-Sly、James D. Osborne、Robert L. Woodward、Gordon S. Currie、Michael C. Willis
DOI:10.1016/j.tet.2009.03.054
日期:2009.6
A variety of β-S-substituted aldehydes undergo efficient and regioselectiverhodiumcatalyzedhydroacylation reactions with 1,3-disubstituted and 1,1,3-trisubstituted allenes, to deliver β,γ-unsaturated ketone products. Regioselectivites are controlled primarily by steric factors. The reactions are catalyzed by the complex [Rh(dppe)]ClO4.
Cadmium‐Doped and Pincer Ligand‐Modified Gold Nanocluster for Catalytic KA
<sup>2</sup>
Reaction
作者:Ji‐Qiang Fan、Ying Yang、Cheng‐Bo Tao、Man‐Bo Li
DOI:10.1002/anie.202215741
日期:2023.2
A goldnanocluster Au17Cd2 (PNP)2 (SR)12 with an icosahedral Au13 kernel, two PNP pincer ligands and two Au2Cd (SR)6 staple motifs has been developed as an efficient catalyst for the KA2 reaction. The cooperation between the three parts of the goldnanocluster has been verified as contributing to its high activity.
金纳米团簇 Au 17 Cd 2 (PNP) 2 (SR) 12具有二十面体 Au 13内核、两个 PNP 钳形配体和两个 Au 2 Cd (SR) 6主基序已被开发为 KA 2反应的有效催化剂。金纳米团簇的三个部分之间的合作已被证实有助于其高活性。