113732-84-6Relevant articles and documents
Versatile Photochemical Reactivity of Diverse Substituted 2-, 4- and 5-(o-Vinylstyryl)oxazoles
?agud, Ivana,?indler-Kulyk, Marija,Vojnovi?-Jandri?, Dragana,Marini?, ?eljko
, p. 515 - 524 (2018)
To study the effects of the position of the hexatrienyl moiety on the oxazole ring, novel substituted cis/trans-2/4/5-(2-vinylstyryl)oxazoles have been synthesized. These novel compounds were prepared by Wittig reaction from the diphosphonium salt of α,α′-o-xylenedibromide, formaldehyde and the corresponding 2-methyl-4-, 4-methyl-2-, 2-pheny-5- and 4-methyl-5-oxazolecarbaldehyde, respectively. Aldehydes were synthesized by using several synthetic approaches. By applying intramolecular photocycloaddition, 2-methyl-4-(2-vinylstyryl)oxazole afforded, as major product, fused oxazoline-benzobicyclo[3.2.1]octene with small quantities of 4-(1,2-dihydronaphthalen-2-yl)-2-methyloxazole, as electrocyclization product. Upon irradiation of 4-methyl-5-(2-vinylstyryl)oxazole, endo- and exo-benzobicyclo[2.1.1]hexene products were formed by [2+2] cycloaddition; this was the first instance of the 1,4-closure to the bicyclo[2.1.1]hexene skeleton in the 2-, 4-, and 5-oxazole-stilbene derivatives studied so far. Derivatives 2-phenyl-5- and 4-methyl-2-(2-vinylstyryl)oxazole did not react and gave only high-weight molecular products but were crucial as a comparison in the overall mechanistic study. We have found that, depending on the position of the hexatrienyl moiety in the oxazole ring, as well as on the position of the methyl/phenyl substituents, these new vinylstyryl-2/4/5-oxazole derivatives show diverse photochemical behavior.
The first total synthesis of the antitumor macrolide, rhizoxin
Nakada,Kobayashi,Shibasaki,Iwasaki,Ohno
, p. 1039 - 1042 (1993)
The first total synthesis of the antitumor macrolide, rhizoxin in a highly stereocontrolled manner is described.
Synthesis of 4-arylethynyl-2-methyloxazole derivatives as mGluR5 antagonists for use in the treatment of drug abuse
Iso, Yasuyoshi,Kozikowski, Alan P.
, p. 243 - 246 (2006)
In structure-activity relationship studies directed toward the use of mGluR5 antagonists in the treatment of drug abuse, we sought a convenient means for gaining access to the oxazole analogues of MTEP. Toward this end, the aldehyde group in 2-methyloxazo
Oxidative rearrangements of isobenzofurans: Studies toward the synthesis of the ajudazols
Hobson, Stephen J.,Parkin, Andrew,Marquez, Rodolfo
supporting information; experimental part, p. 2813 - 2816 (2009/05/27)
(Chemical Equation Presented) We present a new facet of isobenzofuran chemistry which allows for its efficient manipulation to generate biologically relevant entities. This methodology has been successfully applied toward the synthesis of ajudazol A.
