ChemInform Abstract: Ring-Closing Metathesis of Titanium-Carbene Complexes Prepared from Thioacetals Having a Carbon-Carbon Double Bond.

ChemInform ◽  
2000 ◽  
Vol 31 (41) ◽  
pp. no-no
Author(s):  
Tooru Fujiwara ◽  
Yoshiko Kato ◽  
Takeshi Takeda
Keyword(s):  
Double Bond ◽  
Ring Closing Metathesis ◽  
Carbene Complexes ◽  
Carbon Double Bond

scholarly journals Transformations of terpenes and terpenoids via carbon–carbon double bond metathesis

2018 ◽  
Vol 8 (16) ◽  
pp. 3989-4004 ◽  
Author(s):  
Christian Bruneau ◽  
Cédric Fischmeister ◽  
Dalmo Mandelli ◽  
Wagner A. Carvalho ◽  
Eduardo N. dos Santos ◽  
...  
Keyword(s):  
Double Bond ◽  
Olefin Metathesis ◽  
Ring Opening ◽  
Ring Closing Metathesis ◽  
Cross Metathesis ◽  
Carbon Double Bond ◽  
Review Reports

The review reports on transformations of unsaturated terpenes and terpenoids via olefin metathesis processes including ring closing metathesis of dienes, cross metathesis with functional olefins and ethenolysis, and ring opening metathesis as well as ring opening/cross metathesis.

Reactions of 4-Pyrones with Azomethine Ylides as a Chemo­selective Method for the Construction of Multisubstituted Pyrano[2,3-c]pyrrolidines

Synthesis ◽  
2021 ◽  
Author(s):  
Dmitrii L. Obydennov ◽  
Vyacheslav D. Steben’kov ◽  
Konstantin L. Obydennov ◽  
Sergey A. Usachev ◽  
Vladimir S. Moshkin ◽  
...  
Keyword(s):  
Double Bond ◽  
Ring Opening ◽  
Azomethine Ylides ◽  
Azomethine Ylide ◽  
Dipolar Cycloaddition ◽  
Computational Studies ◽  
Carbon Double Bond ◽  
Reactivity Indexes ◽  
Reaction Proceeds

Abstract4-Pyrones bearing electron-donating and electron-withdrawing groups react with nonstabilized azomethine ylides to form pyrano[2,3-c]pyrrolidines in moderate to good yields. The reaction proceeds chemoselectively as a 1,3-dipolar cycloaddition of the azomethine ylide at the carbon–carbon double bond of the pyrone activated by the electron-withdrawing substituent. The reactivity of 4-pyrones toward azomethine ylides was rationalized by computational studies with the use of reactivity indexes. The pyrano[2,3-c]pyrrolidine moiety could be modified, for example by a ring-opening transformation under the action of hydrazine to provide pyrazolyl-substituted pyrrolidines.

Cycloaddition reactions across the carbon-carbon double bond of thiirene 1,1-dioxide

1984 ◽  
Vol 49 (7) ◽  
pp. 1300-1302 ◽  
Author(s):  
Mitsuo Komatsu ◽  
Yasuo Yoshida ◽  
Masatoshi Uesaka ◽  
Yoshiki Ohshiro ◽  
Toshio Agawa
Keyword(s):  
Double Bond ◽  
Cycloaddition Reactions ◽  
Carbon Double Bond
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