The action of red light on solid caryophyllene nitrosite, C15H24N2O3: (i) the reaction products; (ii) the crystal structures of caryophyllene nitrosite and of dinitrocaryophyllene, C15H24N2O4; (iii) electron paramagnetic resonance studies; and (iv) the solid-state reaction mechanisms
作者:Andrew A. Freer、Derek K. MacAlpine、Judith A. Peacock、Andrew L. Porte
DOI:10.1039/p29850000971
日期:——
similar and caryophyllenenitrosite forms solid solutions in dinitrocaryophyllene. Irradiation of these solid solutions with redlight generates a monoalkyl nitroxide radical (11). in two symmetry-related orientations, whose spin- Hamiltonian parameters and orientations in the unit cell of the dinitrocaryophyllenecrystal have been determined by detailed analyses of single-crystal e.p.r. spectra. Photolysis
Synthesis of isocaryophyllene by titanium-induced keto ester cyclization.
作者:John E. Mc Murry、Dennis D. Miller
DOI:10.1016/s0040-4039(00)81797-9
日期:1983.1
A total synthesis of d,1 isocaryophyllene is reported that employs the titanium-induced cyclization of a keto ester as the key step in forming the cyclononenone ring. The synthesis requires four steps starting from ethyl geranylacetate, and the key cyclization occurs in 38% yield.
Strained rings to assess the “endo preference” of 2-alkyl branched 2-alkenylpotassium species
作者:Martina Kotthaus、Manfred Schlosser
DOI:10.1016/s0040-4039(98)00689-3
日期:1998.6
tert-butoxide, two allylic organopotassium species (2) are generated from the (E)-isomeric caryophyllene and the (Z)-isomeric isocaryophyllene. Torsional equilibration occurs slowly at −50 °C (in tetrahydrofuran) and rapidly at 0 °C (in hexane) to afford endo-2/exo-2 mixtures of about 95:5 (as evidenced by the isomeric composition of the trapping products 3). The relative thermodynamicstabilities of the two