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• 38651-65-9 (1R,5S)-(+)-nopinone 

Relevant academic research and scientific papers

Sustainable terpene-based polyamides: Via anionic polymerization of a pinene-derived lactam

A sustainable lactam, which is derived from the renewable terpene β-pinene, is converted to polyamides via a convenient anionic ring-opening polymerization (ROP), which can be easily handled without the use of a costly catalyst. The resulting polyamides have prosperous thermal properties, which enable their future use as high-performance polymers.

Guest/host relationships in the synthesis of the novel cage-based zeolites SSZ-35, SSZ-36, and SSZ-39

Here, we report the synthesis and structure of three high-silica molecular sieves, SSZ-35, SSZ-36, and SSZ-39, that are prepared from a library of 37 different cyclic and polycyclic quaternized amine molecules that are used as structure-directing agents (SDAs). The size and shape of the quaternized amine molecules are purposely designed in order to obtain novel zeolite structures, and the synthesis of these molecules is presented. The selectivity for the three molecular sieve phases is found to depend on both the SDA and the degree of heteroatom lattice substitution of Al3+ or B3+ in the silicate framework. Molecular modeling is utilized to probe the effects of the nonbonded SDA/zeolite-framework interaction energy on the selectivity for the observed molecular sieve phase. The Rietveld refinement of the powder X-ray data confirms the structure of the SSZ-39 zeolite to be isomorphous with the aluminophosphate molecular sieve, SAPO-18 (AEI). The structure of SSZ-36 is found to possess a range of fault probabilities between the two-dimensional channel system, end-member polymorphs, ITQ-3 and RUB-13 (International Zeolite Association Codes ITE and RTH, respectively). The SSZ-35 structure is reported to contain a one-dimensional pore system possessing stacked cages circumscribed by alternating rings of 10 and 18 tetrahedral atoms (10- and 18-membered rings).

Synthesis and antiviral and cytostatic activities of carbocyclic nucleosides incorporating a modified cyclobutane ring. Part 1: Guanosine analogues

Five new carbocyclic nucleosides were prepared by constructing a guanine (compounds 3,5) or 8-azaguanine (compounds 4, 6, and 7) base on the amino group of (1'S,3'R)-3-(3'-amino-2',2'-dimethylcyclobutyl)propan-1-ol (8), and their activities against a variety of viruses and tumor cell lines were determined. Only compounds 3 and 7 showed a detectable activity at subtoxic concentrations against some viruses tested.

CHIRALITY TRANSFER DURING CYCLOBUTYL-CYCLOPROPYLMETHYL-HOMOALLYL CATION REARRANGEMENT AND SYNTHESIS OF (-)-ELDANOLIDE

The (3R)-2,2-dimethyl-3-(2-methoxycarbonyl)ethylcyclobutyl cation rearranged to give (1S,2S)-1-(1-methoxy-1-methyl)ethyl-2-(2-methoxycarbonyl)ethylcyclopropane.The latter was transformed into (4R)-4-(3-methylbut-2-enyl)-4-butyrolactone with a high degree of chirality transfer.The γ-lactone was converted into (-)-eldanolide, an antipode of the wing gland pheromone of an African sugar-cane borer.