Synthesis of Allenes via Nickel-Catalyzed Cross-Coupling Reaction of Propargylic Bromides with Grignard Reagents
作者:Qinghan Li、Hanmou Gau
DOI:10.1055/s-0031-1290365
日期:2012.3
method for the synthesis of terminal allenes from cross-coupling of propargylic bromide with Grignardreagent. The reaction of propargylic bromide with 1.2 equivalents of Grignardreagent mediated by Ni(acac)2 (2 mol%) and Ph3P (4 mol%) in THF may produce terminal allenes in good yields and high regioselectivities at room temperature. allenes - nickel - propargylic bromide - Grignardreagent - cross-coupling
Chemical optimization of macrocyclic HIV-1 inactivators for improving potency and increasing the structural diversity at the triazole ring
作者:Adel A. Rashad、Kriti Acharya、Ann Haftl、Rachna Aneja、Alexej Dick、Andrew P. Holmes、Irwin Chaiken
DOI:10.1039/c7ob01448a
日期:——
cyclization residues and Ile and Trp sidechains in the gp120-binding pharmacophore, exhibited relatively low tolerance for change, reflecting the importance of these components for function. In contrast, in the pharmacophore-central triazole position, the ferrocene moiety could be successfully replaced with smaller aromatic rings, where a p-methyl-phenyl methylene moiety gave cPT 24 with an IC50 value of
Cobalt-Catalyzed 1,1,3-Triborylation of Terminal Alkynes
作者:Xiaoxu Yang、Shaozhong Ge
DOI:10.1021/acs.organomet.2c00053
日期:2022.7.25
We have developed a cobalt-catalyzed regioselective 1,1,3-triborylation reaction of terminalalkynes with pinacolborane (HBpin) with a catalyst generated in situ from readily available and bench-stable Co(acac)2 and xantphos. A variety of terminalalkynes undergo this triborylation reaction, affording the corresponding 1,1,3-triborylalkanes in good yields with high selectivity. The synthetic utility