7019-94-5Relevant academic research and scientific papers
Phosphine-Catalyzed Intermolecular Dienylation of Alkynoate with para-Quinone Methides
Song, Zefeng,Wang, Weijia,Liu, Zhixin,Lu, Yue,Wang, De
, p. 8590 - 8599 (2021/07/20)
An interesting remote I-C 1,6-Addition and an isomerization cascade reaction for phosphine-catalyzed activated alkynes have been disclosed. The products featuring a functional diene and a 1,1-diaryl methyl motif have been obtained in moderate to good yields (30-86%) by applying para-quinone methides (p-QMs) and I-substituted alkynoate with tributylphosphine (PnBu3) catalysis, along with high regioselectivity and stereoselectivity (dr > 20:1). The wide scope of compatible substrates (35 examples), such as indolyl, oxindolyl, ester, and cinnamyl, expand the utility of this methodology. A plausible mechanism and some applications of it have also been presented.
Palladium-Catalyzed Addition of Arylboronic Acids to para- Quinone Methides for Preparation of Diarylacetates
Zhuge, Ruijing,Wu, Liang,Quan, Mao,Butt, Nicholas,Yang, Guoqiang,Zhang, Wanbin
, p. 1028 - 1036 (2017/03/27)
A palladium-catalyzed addition of arylboronic acids to para-quinone methides has been developed. The catalytic system employing 4,4′-dimethoxy-2,2′-bipyridine (DMeO-BPy) as ligand and trifluoroethanol (TFE) as solvent provides diarylacetate products in high yields. A wide range of functionalized arylboronic acids can be used and the method tolerates some variation in the scope of the para-quinone methides. (Figure presented.).
Easy large scale syntheses of 2,6-di-t-butyl7-cyano-, 7-carboxy- and 7- methoxycarbonyl quinone methides
Nesvadba, Peter
, p. 2825 - 2832 (2007/10/03)
Easy large scale syntheses of 2,6-di-t-butyl-7-cyano-, 7-carboxy- and 7- methoxycarbonyl quinone methides 1-3 using cheap and readily available starting materials have been developed.
7-substituted quinone methides as inhibitors for unsaturated monomers
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, (2008/06/13)
Ethylenically unsaturated monomers are protected from premature polymerization during manufacture and storage by the incorporation therein of an effective stabilizing amount of a 7-substituted quinone methide compound.
