نتایج جستجو برای: dihydropyran
تعداد نتایج: 69 فیلتر نتایج به سال:
In 1970 we observed that the course of the photochemical cycloadditions of certain ethylenic and acetylenic compounds to benzene, earlier reported by us [1, 2], was profoundly altered in the presence of proton donors, leading to a type of photochemical Friedel-Crafts reaction [3]. Since then, we have described, mostly in preliminary form, numerous further examples of acid catalysis in the photo...
Catalytic amount of Ce(IV) as ceric triethylammonium nitrate (CTEAN) in dichloromethane or acetone can bring about an efficient tetrahydropyranylation of different types of alcohols to afford the corrsesponding tetrahydropyranyl ethers in high yields. Deportection of tetrahydropyranyl ethers can also be achieved efficiently in the presence of this catalyst in methanol.
Lignocellulosic tetrahydrofuranic (THF) biofuels have been identified as promising fuel candidates for spark-ignition (SI) engines. To support the potential use transportation biofuels, fundamental studies of their combustion and emission behavior are highly important. In present study, high-temperature (HT) chemistry tetrahydrofurfuryl alcohol (THFA), a THF based biofuel, was investigated usin...
An unusual aspect of actinobacterial metabolism is the use of the redox cofactor F420. Studies have shown that actinobacterial F420H2-dependent reductases promiscuously hydrogenate diverse organic compounds in biodegradative and biosynthetic processes. These enzymes therefore represent promising candidates for next-generation industrial biocatalysts. In this work, we undertook the first broad s...
Furanoids are important targets either as a key entity itself or as a substructure that represents the framework of many biologically significant natural products [1]. Therefore, their access has attracted the interest of many groups [2], Voelter et al. have described elegant strategies for the syntheses of furanoids using two different approaches, either mono or dianions derived from 1,3-dicar...
Since the isolation of potent cytotoxic communesins A and B from a marine fungal strain of Penicillium sp. in 1993,1 eight members (A-H) of this structurally intriguing indole alkaloid family were consecutively disclosed over the past 5 years2 (Figure 1). Although the polycyclic framework and multiple stereocenters of communesins have attracted intensive synthetic efforts toward skeletal constr...
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