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
Keyword(s):  
Conjugate Addition ◽  
Spiro Compounds ◽  
Quinone Methides

Copper-catalyzed 1,6-conjugate addition of para-quinone methides with diborylmethane

2021 ◽  
Author(s):  
Xin Li ◽  
Guoliang Gao ◽  
Songtao He ◽  
Qiuling Song
Keyword(s):  
Catalytic System ◽  
Conjugate Addition ◽  
Quinone Methides ◽  
High Yields

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...

Organocatalytic cascade 1,6-conjugate addition/annulation/tautomerization of functionalized para-quinone methides: Access to chiral 2-amino-4-aryl-4H-chromenes

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

Diastereo- and Enantioselective 1,6-Conjugate Addition of 2-Azaarylacetamides to para-Quinone Methides

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

scholarly journals Cover Feature: para -Quinone Methides as Acceptors in 1,6-Nucleophilic Conjugate Addition Reactions for the Synthesis of Structurally Diverse Molecules (Eur. J. Org. Chem. 18/2020)

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 ◽  
...  
Keyword(s):  
Conjugate Addition ◽  
Addition Reactions ◽  
Quinone Methides

Non-hydrogen bond catalyst-mediated diastereoselective conjugate additions of 5H-oxazol-4-ones to o-hydroxyphenyl-substituted p-quinone methides

2020 ◽  
Vol 18 (35) ◽  
pp. 6807-6811
Author(s):  
Ziyang Wang ◽  
Anqi Huang ◽  
Fang Fang ◽  
Pengfei Li ◽  
Guokai Liu ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Conjugate Addition ◽  
Quinone Methides ◽  
Conjugate Additions ◽  
High Yields

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.

1,6-Conjugate addition initiated formal [4+2] annulation of p-quinone methides with sulfonyl allenols: a unique access to spiro[5.5]undeca-1,4-dien-3-one scaffolds

2020 ◽  
Vol 56 (37) ◽  
pp. 5022-5025 ◽  
Author(s):  
Ganesh S. Ghotekar ◽  
Sachin R. Shirsath ◽  
Aslam C. Shaikh ◽  
M. Muthukrishnan
Keyword(s):  
Conjugate Addition ◽  
Quinone Methides ◽  
One Pot ◽  
One Pot Synthesis

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.

Bifunctional tertiary amine-squaramide catalyzed asymmetric catalytic 1,6-conjugate addition/aromatization of para-quinone methides with oxindoles

2016 ◽  
Vol 52 (22) ◽  
pp. 4183-4186 ◽  
Author(s):  
Yu-Hua Deng ◽  
Xiang-Zhi Zhang ◽  
Ke-Yin Yu ◽  
Xu Yan ◽  
Ji-Yuan Du ◽  
...  
Keyword(s):  
Tertiary Amine ◽  
Conjugate Addition ◽  
Quinone Methides ◽  
Asymmetric Catalytic ◽  
Quaternary Stereocenters

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

Mn-Catalyzed 1,6-conjugate addition/aromatization of para-quinone methides

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

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