1,6-Conjugate-Addition-Induced [2 + 1] Annulation of para-Quinone Methides and Pyrazolones: Synthesis of Bis-Spiro Compounds with Contiguous Quaternary Spiro-Centers

2019 ◽  
Vol 21 (19) ◽  
pp. 7736-7740 ◽  
Author(s):  
Someshwar B. Kale ◽  
Popat K. Jori ◽  
Thanusha Thatikonda ◽  
Rajesh G. Gonnade ◽  
Utpal Das
Author(s):  
Xin Li ◽  
Guoliang Gao ◽  
Songtao He ◽  
Qiuling Song

Presented herein is the first 1,6-conjugate addition of diborylmethane, which is promoted by a simple and inexpensive copper catalytic system. This method features high yields, good selectivities and broad functional...


2018 ◽  
Vol 29 (8) ◽  
pp. 1273-1276 ◽  
Author(s):  
Cong Duan ◽  
Ling Ye ◽  
Wenqin Xu ◽  
Xinying Li ◽  
Feng Chen ◽  
...  

2019 ◽  
Vol 21 (15) ◽  
pp. 6063-6067 ◽  
Author(s):  
Yan Wang ◽  
Kaixuan Wang ◽  
Weidi Cao ◽  
Xiaohua Liu ◽  
Xiaoming Feng

2020 ◽  
Vol 2020 (18) ◽  
pp. 2642-2642
Author(s):  
Carolina G. S. Lima ◽  
Fernanda P. Pauli ◽  
Dora C. S. Costa ◽  
Acácio S. de Souza ◽  
Luana S. M. Forezi ◽  
...  

2020 ◽  
Vol 18 (35) ◽  
pp. 6807-6811
Author(s):  
Ziyang Wang ◽  
Anqi Huang ◽  
Fang Fang ◽  
Pengfei Li ◽  
Guokai Liu ◽  
...  

An efficient DBU-catalyzed conjugate addition of 5H-oxazol-4-ones to o-hydroxyphenyl-substituted p-quinone methides has been developed, affording the valuable diarylmethanes in high yields with excellent diastereoselectivity.


2020 ◽  
Vol 56 (37) ◽  
pp. 5022-5025 ◽  
Author(s):  
Ganesh S. Ghotekar ◽  
Sachin R. Shirsath ◽  
Aslam C. Shaikh ◽  
M. Muthukrishnan

An expedient one-pot synthesis of carbocyclic spiro[5.5]undeca-1,4-dien-3-ones via 1,6-conjugate addition initiated formal [4+2] annulation sequences by employing p-quinone methides and sulfonyl allenols.


2016 ◽  
Vol 52 (22) ◽  
pp. 4183-4186 ◽  
Author(s):  
Yu-Hua Deng ◽  
Xiang-Zhi Zhang ◽  
Ke-Yin Yu ◽  
Xu Yan ◽  
Ji-Yuan Du ◽  
...  

A novel organocatalytic enantioselective 1,6-addition of p-QMs has been developed to access diarylmethine-functionalized oxindoles bearing vicinal tertiary and quaternary stereocenters.


2018 ◽  
Vol 16 (24) ◽  
pp. 4547-4557 ◽  
Author(s):  
Bobin Yang ◽  
Wei Yao ◽  
Xiao-Feng Xia ◽  
Dawei Wang

A series of ferrocenyl triazole ligands have been synthesized and characterized, which proved to be effective for the Mn-catalyzed 1,6-conjugate addition/aromatization of para-quinone methides.


Sign in / Sign up

Export Citation Format

Share Document