2424-92-2Relevant articles and documents
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Guenthard et al.
, p. 1147,1158 (1953)
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Method for producing long-chain diacid monoester
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, (2018/08/03)
The invention provides a method for producing long-chain diacid monoester. The method comprises the following steps: carrying out reaction on diacid and benzyl alcohol or tert-butyl alcohol in tolueneunder the condition that an acidic catalyst exists; cooling a reaction solution until the residual diacid is precipitated; filtering diacid sediment; furthermore, cooling the reaction solution untilmonoester is precipitated; filtering sediment of the monoester shown as a formula I. The method provided by the invention can be used for harvesting monoester with high yield and undesired byproductsare reduced to be zero.
INTRAMOLECULAR END-TO-END REACTIONS OF PHOTOACTIVE TERMINAL GROUPS LINKED BY POLYMETHYLENE CHAINS.
Ashikaga,Ito,Yamamoto,Nishijima
, p. 198 - 204 (2007/10/02)
Intramolecular end-to-end reactions of a pair of photoactive terminal groups, dibenz left bracket b,f right bracket azepine (DBA) chromophores, linked by a series of polymethylene chains (DBA-CO(CH//2)//nCO-DBA, n equals 2-30) were studied by two different approaches. One approach is to measure the intramolecular deactivation rate constants of the excited triplet state of terminal DBA groups by the nanosecond laser photolysis and the other is to measure the intramolecular photocyclization rates of these bichromophoric compounds by the quantitative product analysis with GPC. The excited triplet state of the DBA group is the intermediate of the reaction.
