Flash vacuum pyrolysis (FVP) of 2-azidocycloheptanone gave two products: 3,4,5,6-tetrahydro-1H-azocin-2-one and 1-hydroxy-2-oxo-4- azabicyclo[5.3.0]dec-4-ene-3-spiro-2¡¦-cycloheptanone. Flash vacuum pyrolysis of 2-[2-(4-methoxyphenyl)vinyl]benzofuran gave two products: 4-(2-benzofuran-2-ylvinyl)phenol and 1H-6-oxacyclopenta[c]fluorine.

Flash vacuum pyrolysis (FVP) of 1-azidoindene, which via a nitrene intermediate, gave some products of rearrangement¡Gquinoline¡Bisoquinoline and 1-methylene-1H-isoindole¡CUnder pyrolytic conditions, 3-(4-methoxystyryl)thiophene could get a radical intermediate and gave 3-(4-hydroxystyryl)thiophene, or it gave contractive tricyclic compounds which having signals on spectrum but inseparable, like as indene structures.

Due to large amount of solid wastes produced each year, thermal treatment in conjunction with the resource utilization has become attractive in the future. Treatment by pyrolysis can recover the gaseous products for fuels and solid residuals, thus it has potential for R&D and market development.

Flash vacuum pyrolysis(FVP) of azidomethylthiophene,via a nitrene intermediate,gave two products,a dimer (thienylmethylidene-thienylamine) and a trimer (N,N`-dithienyl methylidene-thienylmethylidene diamine).The trimer underwent cyclization and dehydrogenation to afford 2,4,5-trithienylimidazole. However by the same route, FVP of azidomethylbenzo[b]furan produced only a trimer(dibenzo[b]furylmethylidene-N,N'-benzo[b]furylmethyl amine).

(1) The pyrolysis of benzoic 5-benzyl-2-furoic anhydride by using SS-FVP method can obtain the ring-opened product naphthalene, and no ring-contracted product and its further derivatives. (2) Flash vacuum pyrolysis (FVP) of 2-(2-azidoethyl)thiophene, via a nitrene intermediate gave 1,2-di(2-thienyl)ethane, 3,5-di(2-thienyl)pyridine, and 2-methylthiophene as the main products.

(1) Flash vacuum pyrolysis (FVP) of (5-methyl-2-selenophenyl)methyl benzoate gave 4-methylene-4H-selenopyran. The structure was confirmed by trapping experiment. The mechanism for the 4-methylene-4H-selenopyran will be discussed. (2) Flash vacuum pyrolysis of 2-Azidomethylselenophene, via a nitrene intermediate, gave a trimer (N,N¡¦-di-2-selenophenylmethylidene-2-selenophenylmethylidene diamine).

Flash vacuum pyrolysis (FVP) of 2-azidoacetophenone gave the dimer 2-benzoyl-4- phenylimidazole and the trimer: 2,3-dibenzoyl-5-phenylpyrazine. Flash vacuum pyrolysis of 2-azido-1-(2-thienyl)ethanone gave the dimer: 2-(2-fromylthienyl)-4-(2-thienyl)imidazole and 2-formylthiophene.

Flash vacuum pyrolysis (FVP) of 2-azido-1-(1-methyl-2-pyrryl)ethanone and 2-azido-1- (2-benzo[b]thienyl)ethanone gave nitrene by elimination of one nitrogen molecule. When 2-azido-1-(1-methyl-2-pyrryl)ethanone as a precorsor, the reactive nitrene readily underwent self-condensation to give 2-(1-methyl-2-formylpyrryl)-4-(1-methyl-2- pyrryl)imidazole, it¡¦s isomer and 2,4,5-tri(1-methyl-2-formylpyrryl) imidazole. While 2-azido-1-(2-benzo[b]thienyl)ethanone as a precorsor, the reactive nitrene readily underwent self-condensation to give 2-2-formylbenzo[b]thienyl-5-(2-benzo[b]thiophen-2-yl)imidazole. The mechanism for the formation of products of self-condensation reaction from FVP of 2-azido-1-(1-methyl-2-pyrryl)ethanone and 2-azido-1-(2-benzo[b]thienyl) ethanone will be discussed.

Abstract¡G ¤@¡B trans o-Thiomethoxystilbene and its derivatives 19a-c had been studied by means of pyrolysis and photolysis. Under pyrolytic conditions, compounds 19a-c gave not only the products 24¡B30¡B33,but also their corresponding isomers 26¡B31¡B34 . Furthermore, compound 19c gave dibenzothiophene (32) as the major product by opening the furan ring at higher temperature. Under photolytic conditions, compounds 19a-c gave the corresponding photocyclic products 40¡B44¡B46. With the exception of 19c, photolysis of 19a and 19b also gave 24 and 30, respectively. ¤G¡B For synthetic study of thieno-fused derivatives 4 and 5 of truxene, preparation monomer 6 and 7 can be accomplished in two steps by means of flash vacuum pyrolysis.

Thesis (M.S.)--University of Central Florida, 2008. / Adviser: Michael Sigman. Includes bibliographical references (p. 118-122).