Organocatalytic Enantioselective 1,6-aza -Michael Addition of Isoxazolin-5-ones to p -Quinone Methides

2020 ◽  
Vol 2020 (5) ◽  
pp. 627-630 ◽  
Author(s):  
Ricardo Torán ◽  
Carlos Vila ◽  
Amparo Sanz-Marco ◽  
M. Carmen Muñoz ◽  
José R. Pedro ◽  
...  
Keyword(s):  
Michael Addition ◽  
Quinone Methides

Metal-Free One-Pot Synthesis of 3-Phosphinoylbenzofurans via Phospha-Michael Addition/Cyclization of H-Phosphine Oxides and in Situ Generated ortho-Quinone Methides

2018 ◽  
Vol 20 (2) ◽  
pp. 477-480 ◽  
Author(s):  
Ji-Yuan Du ◽  
Yan-Hua Ma ◽  
Rui-Qing Yuan ◽  
Nana Xin ◽  
Shao-Zhen Nie ◽  
...  
Keyword(s):  
Michael Addition ◽  
Phosphine Oxides ◽  
Quinone Methides ◽  
One Pot ◽  
Metal Free ◽  
One Pot Synthesis

An organic-base catalyzed asymmetric 1,4-addition of tritylthiol to in situ generated aza-o-quinone methides at the H2O/DCM interface

2019 ◽  
Vol 55 (18) ◽  
pp. 2668-2671 ◽  
Author(s):  
Xianghui Liu ◽  
Kai Wang ◽  
Wengang Guo ◽  
Yan Liu ◽  
Can Li
Keyword(s):  
Michael Addition ◽  
Organic Base ◽  
Quinone Methides

Highly enantioselective organocatalytic Michael addition of tritylthiol to N-o-QM intermediates generated in situ at the H2O/DCM interface is presented.

scholarly journals Sc(OTf)3 Catalyzed Oxo-Michael Addition to o-Quinone Methides by Alcohols

2019 ◽  
Vol 39 (2) ◽  
pp. 555
Author(s):  
Shuo Zhang ◽  
Dan Peng ◽  
Ning Zhao ◽  
Yitao Yu ◽  
Feng Wang ◽  
...  
Keyword(s):  
Michael Addition ◽  
Quinone Methides

scholarly journals Squaramide-Catalyzed Enantioselective Michael Addition of Pyrazol-3- ones to ortho-Quinone Methides

2020 ◽  
Vol 17 (11) ◽  
pp. 837-844
Author(s):  
Laura Carceller-Ferrer ◽  
Gonzalo Blay ◽  
José R. Pedro ◽  
Carlos Vila
Keyword(s):  
Michael Addition ◽  
Enantiomeric Excess ◽  
Quinone Methides

A bifunctional squaramide catalyzed the enantioselective Michael addition of pyrazol-3- ones to ortho-quinone methides, generated in situ from 2-(1-tosylalkyl)phenols is presented. The corresponding chiral pyrazolones are obtained with good to excellent yields (27-98%) and enantiomeric excess (14-99% ee).

1,6-Aza-Michael addition of para-quinone methides with N-heterocycles catalyzed by Zn(OTf)2: A regioselective approach to N-diarylmethyl-substituted heterocycles

Tetrahedron ◽  
2020 ◽  
Vol 76 (28-29) ◽  
pp. 131338
Author(s):  
Soumitra Guin ◽  
Hemonta K. Saha ◽  
Ashvani K. Patel ◽  
Santosh K. Gudimella ◽  
Subhankar Biswas ◽  
...  
Keyword(s):  
Michael Addition ◽  
Quinone Methides

Enantioselective Organocatalytic Michael Addition and Ring Closure Cascade Reaction of o ‐Quinone Methides with Nitriles

2020 ◽  
Vol 41 (5) ◽  
pp. 570-573 ◽  
Author(s):  
Jin Wha Park ◽  
Subin Jang ◽  
Mi Hyeon Choo ◽  
Dae Young Kim
Keyword(s):  
Michael Addition ◽  
Cascade Reaction ◽  
Ring Closure ◽  
Quinone Methides

scholarly journals Scandium(III)-Catalyzed Aza-Michael Addition of in Situ Generated ortho-Quinone Methides with Amines: An Efficient Access to Betti Base Derivatives

2019 ◽  
Vol 39 (3) ◽  
pp. 709
Author(s):  
Shuo Zhang ◽  
Ning Zhao ◽  
Qinggang Li ◽  
Jiaqi Zhang ◽  
Zitong Hou ◽  
...  
Keyword(s):  
Michael Addition ◽  
Quinone Methides ◽  
Betti Base ◽  
Efficient Access
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