Erbium(III) Triflate is a Highly Efficient Catalyst for the Synthesis of β-Alkoxy Alcohols, 1,2-Diols and β-Hydroxy Sulfides by Ring Opening of Epoxides
ring-opening reaction of epoxides with erbium(III) triflate are described. Epoxides can be cleaved under neutral conditions with alcohols and thiols in the presence of catalytic amounts of Lewis acid, affording the corresponding β-alkoxy alcohols and β-hydroxy sulfides in high yields. In water, epoxide ring opening occurs to produce the corresponding diols in good yields epoxides - Lewis acids - nucleophilic
The reaction of functionalised mono or dichlorinated materials 1a–6a with an excess of lithium and a catalytic amount of a naphthalene (PN) or biphenyl (PB) supportedpolymer (eassily prepared by radical copolymerisation of 2-vinylnaphthalene or 4-vinylbiphenyl with vinylbenzene and divinylbenzene) in THF either in the presence or not of different electrophiles [Me3SiCl, iPrCHO, PhCHO, Et2CO, (CH2)4CO
and a catalytic amount of DTBB (5 mol %) in THF at 0°C (Method A) leads, after hydrolysis, to the corresponding hydroxyethers 2. The reaction can be also carried out in a two-step process: tandem lithiation at −90°C and reaction with the electrophile [BunCHO, (CH2)4CO, PhCOMe, PhMe2SiCl, CO2, PhCN, PhCONMe2, CyNCO, PhNCHPh] at −90 to −60°C (Method B).
The reaction of functionalised mono or dichlorinated materials 1a–6a with an excess of lithium and a catalytic amount of a naphthalene supportedpolymer (P-152, easily prepared by radical copolymerisation of 2-vinylnaphthalene, styrene and divinylbenzene) in THF either in the presence (Barbier-type conditions) or not of different electrophiles [Me3SiCl, BunCHO, BuiCHO, PhCHO, Et2CO, c(C3H5)2CO, Pri2CO
ORGANIC COMPOUND, THREE-DIMENSIONAL ORGANIC FRAMEWORK FORMED BY USING ORGANIC COMPOUND, SEPARATION SIEVE AND OPTICAL LAYER, WHICH COMPRISE ORGANIC FRAMEWORK, AND OPTICAL DEVICE COMPRISING OPTICAL LAYER AS OPTICAL AMPLIFICATION LAYER
申请人:INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
公开号:US20190031586A1
公开(公告)日:2019-01-31
An organic compound, a three-dimensional organic structure formed by using the organic compound, a separation sieve and an optical layer having the organic structure, and an optical device having the optical layer as an optical amplification layer are provided. The organic structure includes a plurality of organic molecules self-assembled by non-covalent bonding. Each of the unit organic molecules has an aromatic ring, a first pair of substituents being connected to immediately adjacent positions of substitutable positions of the aromatic ring, and a second pair of substituents being connected to immediately adjacent positions of remaining substitutable positions of the aromatic ring. The unit organic molecules are self-assembled by van der Waals interaction, London dispersion interaction or hydrogen bonding between the first and the second pairs of the substituents and by pi-pi interactions between the aromatic rings.