- Mechanism-Inspired Design of Bifunctional Catalysts for the Alternating Ring-Opening Copolymerization of Epoxides and Cyclic Anhydrides
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Advances in catalysis have enabled the ring-opening copolymerization of epoxides and cyclic anhydrides to afford structurally and functionally diverse polyesters with controlled molecular weights and dispersities. However, the most common systems employ b
- Abel, Brooks A.,Lidston, Claire A. L.,Coates, Geoffrey W.
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p. 12760 - 12769
(2019/08/26)
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- A 1, 2, 3, 4 - four-toluol preparation method
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The invention relates to the field of organic synthesis, discloses a 1, 2, 3, 4 - four-toluol preparation method, comprising: step 1:1, 7 - dimethyl - 4, 10 - dioxa - tricyclic [5.2.1 . 0] becc - 8 - 8 en - 3, 5 - dione synthetic; step 2:4, 7 - dimethyl - isobenzofuran - 1, 3 - dione synthetic; step 3:1, 2 - double-(hydroxy methyl) - 3, 6 - dimethylphenyl synthetic; step 4:1, 2 - (bromomethyl)-- 3, 6 - dimethylphenyl synthetic; step 5: 1, 2, 3, 4 - four-toluol synthesis. The invention to maleic anhydride, 2, 5 - dimethyl furan as raw materials, high purity of the 1, 2, 3, 4 - tetramethyl-benzene, this method has no high-temperature high-pressure and other dangerous reaction conditions, is not of a special material, and will not synthetic 1, 2, 4, 5 - substances such as tetramethyl-benzene, the final product does not need to follow-up separation, is suitable for industrial production.
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- Synthesis and crystal structures of 1,4,8,11-Tetraalkyl-6,13- diphenylpentacenes
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Two 1,4,8,11-tetraalkyl-6,13-diphenylpentacenes were prepared. X-ray analysis revealed that the methyl derivative had a herringbone arrangement with π-overlap, while the propyl derivative had a slipped-parallel structure without π-overlap. The solid-state
- Kitamura, Chitoshi,Naito, Takao,Yoneda, Akio,Kawase, Takeshi,Komatsu, Toshiki
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p. 771 - 773
(2011/01/08)
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- High performance, acene-based organic thin film transistors
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1,4,8,11-Methyl-substituted 6,13-triethylsilylethynylpentacene shows extended π-π overlap when deposited from solution, yielding organic thin film transistors with high and reproducible hole mobility with negligible hysteresis. The Royal Society of Chemis
- Llorente, Gonzalo Rincon,Dufourg-Madec, Marie-Beatrice,Crouch, David J.,Pritchard, Robin G.,Ogier, Simon,Yeates, Stephen G.
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supporting information; experimental part
p. 3059 - 3061
(2009/12/01)
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- AN IMPROVED METHOD FOR THE PREPARATION OF o-QUINODIMETHANES
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The use of zinc-silver couple for preparation of the o-qionodimethane from 3,6-dimethyl-1,2-bis(bromomethyl)benzene, 1, is described.
- Rubottom, G. M.,Wey, J. E.
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p. 507 - 514
(2007/10/02)
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