31554-48-0Relevant academic research and scientific papers
Diversity oriented approach to phenylalanine derivatives via the dielsalder reaction involving sulfolene intermediates
Kotha, Sambasivarao,Bandi, Vijayalakshmi
, p. 226 - 237 (2015/03/04)
We report a new synthetic approach to highly functionalized phenylalanine derivatives via sulfolenes as latent diene equivalents. Here, the DielsAlder reaction has been used as a key step to assemble diverse unusual amino acid derivatives.
Construction of [4.3.1]propellanes via molybdenum fischer carbene complexes.
Bertolini, Thomas M,Nguyen, Que Huong,Harvey, Daniel F
, p. 8675 - 8678 (2007/10/03)
Treatment of molybdenum Fischer carbene complexes with 6-methylene-7-octen-1-yne derivatives at 40 degrees C generates substituted tricyclo[4.3.1.0(1,6)]deca-2,4-dienes in good yield. Pentacarbonyl(butylmethoxycarbene)molybdenum(0) afforded the highest cyclization yields (54%), while the analogous chromium carbene complex gave no reaction. The range of dienyne substrates that participate in this reaction is explored and its mechanism is analyzed and discussed.
Pesticidal phosphoryl- and phosphinyl-thioalkyl cyclic sufones
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, (2008/06/13)
Compounds of the formula: STR1 wherein X is sulfur or oxygen; R1 is lower alkyl; R2 is lower alkyl, lower straight chain alkoxy, lower alkylthio, phenyl or the group --NR3 R4 where R3 and R4 are independently hydrogen or lower alkyl, provided that when X is oxygen, R2 is not phenyl, are pesticidal, exhibiting activity against pests such as plant fungal diseases and, in many cases, insects.
Decomposition and Isomerization of Bridgehead Cis 1,2-Diazenes (Azoalkanes)
Chae, Woo-Ki,Baughman, Sharon A.,Engel, Paul S.,Bruch, Manfred,Oezmeral, Cenan,et al.
, p. 4824 - 4833 (2007/10/02)
Four acyclic cis 1,2-diazenes, azo-1-adamantane (cis-ada), azo-bicyclooctane (cis-), azo-1-bicycloheptane (cis-), and azo-1-bicyclohexane (cis-) have been generated by UV irradiation of the corresponding trans-isomers.These compounds differ greately in stability, cis- easily surviving at 100 deg C and cis-ada not being isolable.Whereas cis- and cis-only isomerize back to trans on heating, the other two compounds undergo competing loss of nitrogen.The observation that the energy of the transition state for isomerization remains at 42 +/- 1 kcal mol-1 regardless of the cis ground state energy is used to argue that thermal isomerization proceeds via semilinearization rather than rotation.A remarkable correlation of cis ground state energy with cis n,?* excitation energy has emerged from this study.
