GAM-7: an organic-inorganic hybrid layered aluminophosphate crystal formed by zeolite transformation.

The interzeolite conversion (IZC) of metallo- and aluminophosphate zeolites was demonstrated using a non-cyclic secondary amine, diisopropylamine, as the organic structure-directing agent (OSDA). The IZC of AlPO-5 with topology could successfully produce an unknown highly crystalline phase, named GAM-7. In metallo-aluminophosphates (metal-AlPOs), SAPO-5 with a small amount of SiO was also interconverted to a single crystal GAM-7, designated as [Si]GAM-7.

Two-dimensional microporous GAM-6 formed by the interzeolite conversion of CoAPO-5.

The interzeolite conversion of CoAPO-5 with piperidine assistance yielded a new microporous zeotype, GAM-6. Characterization and structural elucidation revealed that GAM-6 has a 3-ring local structure and two-dimensional 10-ring pore channels, and shows reasonable microporosity and solid acidity.

GAM-3: a zeolite formed from AlPO-5 multistep structural changes.

The interzeolite conversion of AlPO4-5 gave a new zeolitic material GAM-2 and the calcination caused further structural changes, forming a new zeolite GAM-3 with a 3-dimensional 12-8-6 ring pore system. This is the first synthetic example of a zeolite formed through multistep structural changes in the metastable phase.

Synthesis, crystal structure and characterization of novel open framework CHA-type aluminophosphate involving a chiral diamine.

A highly crystalline new precursor of CHA-type zeolite AlPO-34 was obtained by using an aluminophosphate gel with a chiral diamine [(S)-(+)-1-(2-pyrrolidinylmethyl)pyrrolidine; CHN] as an organic structure directing agent under hydrothermal synthesis conditions. This precursor (called GAM-1) was changed into the zeolite AlPO-34 which had a high porosity (the Brunauer-Emmett-Teller (BET) surface area is approximately 700 m g) using calcination. The GAM-1 obtained was characterized by various measurements, e.

Antifeedant and termiticidal activities of 6-alkoxycoumarins and related analogs against Coptotermes formosanus Shiraki.

We synthesized 23 6-alkoxycoumarin derivatives, 20 of which are novel compounds. The structures of all compounds were confirmed by NMR, MS, and elemental analysis, and their antifeedant and termiticidal activities against Coptotermes formosanus Shiraki were examined. In a no-choice test, 6-(2-pentynyloxy)coumarin (2v), 6-(2-butynyloxy)coumarin (2u), 6-(2-octynyloxy)coumarin (2w), and 6-methoxycoumarin (2a), demonstrated high termiticidal activity at a concentration of 10 μmol.

Antitermite activities of coumarin derivatives and scopoletin from Protium javanicum Burm. f.

The antitermite (termiticidal and antifeedant) activity of Protium javanicum Burm. f. extract was investigated.

The beta-zeolite synthesized by dry-gel conversion method without the use of sodium hydroxide: characterization and catalytic behaviors.

The nano-sizedbeta-zeolites were synthesized first time by dry gel conversion (DGC) method without the use of sodium hydroxide. Resultant beta-zeolites had particle size of 35-80 nm with SiO2/Al2O3 ratios in the range of 25-400. They had BET surface areas in the range of 290-750 m2 x g(-1) and the external surface area of 41-283 m2 x g(-1): cumulative surface areas were in the range of 420-1050 m2 x g(-1).

Asymmetric synthesis of (alphaR)-polyfluoroalkylated prolinols based on the perfluoroalkyl-induced highly stereoselective reduction of perfluoroalkyl N-Boc-pyrrolidyl ketones.

Reduction of the obtained chiral (S)- tert-butyl 2-(perfluoroalkanoyl)pyrrolidine-1-carboxylate with sodium borohydride or lithium aluminum hydride proceeded smoothly to give the corresponding (S)- tert-butyl 2-((R)-perfluoro-1-hydroxyalkyl)pyrrolidine-1-carboxylate in yields of 73-97% with excellent diastereoselectivities (up to >98% de), compared with the reduction of nonfluorinated (S)-tert-butyl 2-pentanoylpyrrolidine-1-carboxylate.

Fe(III) containing MCM-48 type mesoporous molecular sieves with framework zeolite secondary building units.

Fe(III) containing mesoporous materials (FeMMSH) with zeolite building units were first time synthesized. XRD and N2 adsorption/desorption analysis confirm the mesoporous characters similar to MCM-48. FT-IR analysis of FeMMSH showed an additional band at about 530-550 cm(-1), characteristic of double five-membered ring of zeolite (ZSM-5) secondary building unit.