61563-91-5Relevant academic research and scientific papers
Uranyl-catalyzed hydrosilylation ofpara-quinone methides: access to diarylmethane derivatives
Yu, Jipan,Chen, Siyu,Liu, Kang,Yuan, Liyong,Mei, Lei,Chai, Zhifang,Shi, Weiqun
supporting information, p. 1575 - 1579 (2021/03/01)
An efficient and convenient uranyl-catalyzed reductive hydrosilylation reaction ofpara-quinone methides (p-QMs) was developed by employing silane as the reductant. The hydrosilylation procedure using the UO2(NO3)2·6H2
TBAB-catalyzed 1,6-conjugate sulfonylation of paraquinone methides: A highly efficient approach to unsymmetrical gem-diarylmethyl sulfones in water ?
Liu, Zhang-Qin,You, Peng-Sheng,Zhang, Liang-Dong,Liu, Da-Qing,Liu, Sheng-Shu,Guan, Xiao-Yu
supporting information, (2020/02/11)
A highly efficient sulfonylation of para-quinone methides with sulfonyl hydrazines in water has been developed on the basis of the mode involving a tetrabutyl ammonium bromide (TBAB)-promoted sulfa-1,6-conjugated addition pathway. This reaction provides a green and sustainable method to synthesize various unsymmetrical diarylmethyl sulfones, showing good functional group tolerance, scalability, and regioselectivity. Further transformation of the resulting diarylmethyl sulfones provides an efficient route to some functionalized molecules.
B(C6F5)3 catalysed reduction of: Para -quinone methides and fuchsones to access unsymmetrical diaryl- and triarylmethanes: Elaboration to beclobrate
Mahesh, Sriram,Vijaya Anand, Ramasamy
, p. 8393 - 8401 (2017/10/19)
A mild and efficient method for the synthesis of unsymmetrical diaryl- and triarylmethanes through a B(C6F5)3 catalyzed reduction of para-quinone methides and fuchsones respectively, using the Hantzsch ester as a reducing source has been developed. Detailed mechanistic investigations revealed that the reaction actually proceeds through a Lewis acid-base pair complex derived from B(C6F5)3 and the Hantzsch ester.
1,6-Addition Arylation of para-Quinone Methides: An Approach to Unsymmetrical Triarylmethanes
Gao, Shang,Xu, Xiuyan,Yuan, Zhenbo,Zhou, Haipin,Yao, Hequan,Lin, Aijun
supporting information, p. 3006 - 3012 (2016/07/11)
A 1,6-addition arylation reaction of para-quinone methides with α-isocyanoacetamides and electron-rich aromatic compounds under metal-free conditions has been developed. BF3·Et2O plays two roles in the reaction: catalyzing the cyclization of α-isocyanoacetamides to give oxazoles, and activating the para-quinone methides to achieve the 1,6-addition arylation process. The reaction shows good functional group tolerance, scalability, and regioselectivity. It is a consice protocol for the synthesis of diverse unsymmetrical triarylmethanes. Further transformation of the resulting triarylmethanes provides an efficient route to some functionalized molecules.
Synthesis of spiro[2.5]octa-4,7-dien-6-one with consecutive quaternary centers via 1,6-conjugate addition induced dearomatization of para-quinone methides
Gai, Kuo,Fang, Xinxin,Li, Xuanyi,Xu, Jinyi,Wu, Xiaoming,Lin, Aijun,Yao, Hequan
supporting information, p. 15831 - 15834 (2015/11/10)
An efficient one-pot approach for the synthesis of spiro[2.5]octa-4,7-dien-6-ones by employing para-quinone methides has been developed. The reaction proceeded smoothly in high yields under mild conditions without the use of metals. Moreover, all products obtained herein contained two or three consecutive quaternary centers.
Copper-catalyzed silylation of p-quinone methides: New entry to dibenzylic silanes
López, Aurora,Parra, Alejandro,Jarava-Barrera, Carlos,Tortosa, Mariola
, p. 17684 - 17687 (2015/12/18)
An efficient and general copper(i)-catalyzed silylation of p-quinone-methides is described. Non-symmetric dibenzylic silanes are obtained in high yields under mild reaction conditions. These compounds can be used as bench-stable benzylic carbanion precursors.
