1,4-oxazine

Crystal structure of 1,3,5,7-tetraphenyl-8-(N-phenylformamido)-2-oxa-5-azabicyclo[4.2.0]oct -3-en-7-yl benzoate, C44H34N2O4

C44H34N2O4, triclinic, P1̄ (no. 2), a = 10.4564(13) Å, b = 11.3627(14) Å, c = 15.3946(19) Å, α = 82.106(2)°, β = 75.318(2)°, γ = 77.704(2)°, V = 1722.0(4) Å3, Z = 2, R gt(F) = 0.0420, wR ref(F 2) = 0.1086, T = 296(2) K.

Tetrahydro-1,4-thiazine-3,5-dione

The X-ray structure of the title compound contains eight molecules in the unit cell which form the basis of a herringbone arrangement of hydrogen bonded ribbons.

Pd(ii)-Catalyzed aerobic 1,2-difunctionalization of conjugated dienes: efficient synthesis of morpholines and 2-morpholones

A novel and efficient methodology concerning the Pd(ii)-catalyzed intermolecular difunctionalization of conjugated dienes is reported to synthesize a series of functionalized morpholines and 2-morpholones. Widely distributed and easily obtained β-amino alcohols and α-amino acids, as starting nitrogen and oxygen sources, are successfully applied in the difunctionalization of conjugated dienes respectively. The majority of the desired products were obtained in moderate to excellent yields. Oxygen was successfully employed as a terminal oxidant. Further transformation of the generated products allowed for the expansion of structural diversity.

Novel reaction of 3,4-dibromofuran with azo diesters to give tetrahydropyridazinones

Diels–Alder cycloaddition followed by rearrangement gives unexpected heterocyclic products whose structure is investigated by variable-temperature NMR spectroscopy and X-ray diffraction.