Results 251 to 260 of about 216,387 (290)

[3 + 2]-Cycloaddition of Azaoxyallyl Cations with Hexahydro-1,3,5-triazines: Access to 4-Imidazolidinones.

Organic Letters, 2018
A novel base-promoted [3 + 2] cycloaddition reaction of azaoxyallyl cations with hexahydro-1,3,5-triazines has been developed, affording 4-imidazolidinones in moderate to good yields under mild reaction conditions.
Danqing Ji, Jiangtao Sun
semanticscholar   +1 more source

Nickel-Catalyzed Azide-Alkyne Cycloaddition To Access 1,5-Disubstituted 1,2,3-Triazoles in Air and Water.

Journal of the American Chemical Society, 2017
Transition-metal-catalyzed or metal-free azide-alkyne cycloadditions are methods to access 1,4- or 1,5-disubstituted 1,2,3-triazoles. Although the copper-catalyzed cycloaddition to access 1,4-disubstituted products has been applied to biomolecular ...
Woo Gyum Kim, M. Kang, Jae Bin Lee, M. Jeon, Sungmin Lee, Jungha Lee, Bongseo Choi, P. Cal, Sebyung Kang, Jung-Min Kee, G. Bernardes, J. Rohde, Wonyoung Choe, Sung You Hong   +13 more
semanticscholar   +1 more source

Asymmetric cycloaddition reactions catalysed by diarylprolinol silyl ethers.

Chemical Society Reviews, 2017
Cycloaddition reactions are among the most important tools for the construction of cyclic compounds in organic synthesis, since these reactions are vital to access natural products and biologically active compounds.
Lydia Klier, Fernando Tur, Pernille H. Poulsen, K. A. Jørgensen   +3 more
semanticscholar   +1 more source

Cycloadditions to the Azulene System

Angewandte Chemie International Edition in English, 1970
Cycloadditions to the azulene system have not hitherto been observed. Instead, azulene reacts, e.g., with maleic anhydride via an "addition-substitution route" to give 1-azulenylsuccinic anhydride and with tetracyanoethylene to yield 1-tricy-anovinylazulene[¹].
Hafner, Klaus, Häring, J., Jäkel, W.
openaire   +2 more sources

Application of (4+3) cycloaddition strategies in the synthesis of natural products.

Chemical Society Reviews, 2018
(4+3) Cycloadditions have been widely applied in synthesis, and in this review article, we summarize some of the more recent applications, including formal (4+3) cycloadditions, in the synthesis of natural products.
Z. Yin, Yun-Qing He, P. Chiu
semanticscholar   +1 more source

Selective cycloadditions

Nature Chemistry, 2023
Bo Zhang, Hui Ming Ge
openaire   +2 more sources

Cycloadditions of Allenes

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Takanori Matsuda, Masahiro Murakami
openaire   +2 more sources

Microwaves in Cycloadditions

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Angel Díaz-Ortiz, Fernando Langa, Antonio de la Hoz   +2 more
openaire   +2 more sources

Autocatalytic Cycles in a Copper-Catalyzed Azide-Alkyne Cycloaddition Reaction.

Journal of the American Chemical Society, 2018
This work describes the autocatalytic copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction between tripropargylamine and 2-azidoethanol in the presence of Cu(II) salts. The product of this reaction, tris-(hydroxyethyltriazolylmethyl)amine (N(C3N3)
S. Semenov, Lee Belding, B. Cafferty, Maral P. S. Mousavi, Anastasiia M Finogenova, R. S. Cruz, Ekaterina V. Skorb, G. Whitesides   +7 more
semanticscholar   +1 more source

Cycloadditions and Cycloreversions I. [2+2]-Cycloaddition

1992
It was pointed out in the preceding chapter that correlation diagrams can be read from right to left as easily as from left to right. This is certainly true from the formal viewpoint of orbital symmetry, but does not preclude the need to examine the geometric and energetic consequences of the nuclear motions involved.
openaire   +2 more sources