A novel family of cycloalkanes compounds having one or more allylidene functionalities which can be used to create cross-linked thermosets and thermoplastics having thermal stability. An example heptacyclo [6.6.0.0
2,6
.0
3,13
.0
4,11
.0
5,9
.0
10,14
] tetradecane (HCTD) complex with terminal allylidene groups at the 7- and 12-positions (HCTD-7,12-diallylidene) was generated from norbornadiene via an efficient six-step synthesis. Thermal polymerization at temperatures ranging from 160 to 240° C. yielded a robust cross-linked material with thermal stability up to 485° C. in air, a glass transition temperature of 377° C., and a char yield (600° C.) of 56% in air. Applications include heat resistant composites utilized in the aerospace, electronic, automotive and textile industries.
Synthesis of Heptacyclo[7.7.0.0/2,6/0/3,15/0/4,12/0/5,10/0/11,16]-Hexadeca-7,13-Diene - a Novel Dimer of Barrelene Possessing Perpendobiplanar D2d Symmetry
Catalytic Cage Formation via Controlled Dimerization of Norbornadienes: An Entry to Functionalized HCTDs (Heptacyclo[6.6.0.0<sup>2,6</sup>.0<sup>3,13</sup>.0<sup>4,11</sup>.0<sup>5,9</sup>.0<sup>10,14</sup>]tetradecanes)
作者:Hee Nam Lim、Guangbin Dong
DOI:10.1021/acs.orglett.6b00207
日期:2016.3.4
A general and practical catalytic method has been developed for the rapid synthesis of HCTD (heptacyclo[6.6.0.02,6.03,13.04,11.05,9.010,14]tetradecanes) and various new 7,12-disubstituted HCTDs from norbornadienes. Compared to the known approaches, this new protocol avoids stoichiometric metals, utilizes commercially available reagents as catalysts, and affords higher yields and significantly improved
Syntheses of Rigid and Semirigid Molecules for Investigations of Photoinduced Electron Transfer Reactions
作者:Krishna Kumar、Ronald J. Tepper、Yang Zeng、Matthew B. Zimmt
DOI:10.1021/jo00118a023
日期:1995.6
Investigations of electron transfer reactions in donor-spacer-acceptor (DSA) molecules posessing small numbers of reactive conformations have significantly increased understanding of factors that control transfer rate constants. The syntheses of polynorbornane-based DSA molecules 12, 16, 20, 26, 30, and 34 and heptacyclotetradecane-based DSA molecules 40, 47, 51, and 60 are described. These molecules have been used to explore the effects of electronic symmetry, solvent electronic structure, and temperature on photoinduced electron transfer reactions.
Heptacyclo[5.5.1.14,10.02,6.03,11.05,9.08,12]tetradecane-13,14-dione: a novel, polycyclic perpendobiplanar D2d diketone
作者:Alan P. Marchand、Arthur D. Earlywine
DOI:10.1021/jo00183a037
日期:1984.5
MARCHAND, A. P.;EARLYWINE, A. D., J. ORG. CHEM., 1984, 49, N 9, 1660-1661
作者:MARCHAND, A. P.、EARLYWINE, A. D.
DOI:——
日期:——
BARDEN, TIMOTHY J.;PADDON-ROW, MICHAEL N., AUSTRAL. J. CHEM., 41,(1988) N 5, C. 817-822