Continuous-flow hydration–condensation reaction: Synthesis of α,β-unsaturated ketones from alkynes and aldehydes by using a heterogeneous solid acid catalyst
A simple, practical and efficient continuous-flow hydration-condensation protocol was developed for the synthesis of alpha,beta-unsaturated ketones starting from alkynes and aldehydes by employing a heterogeneouscatalyst in a flow microwave. The procedure presents a straightforward and convenient access to valuable differently substituted chalcones and can be applied on multigram scale.
GUPTA K. C.; PATHAK P. K.; SAXENA B. K.; SRIVASTAVA N.; PANDEY K., J. CHEM. AND ENG. DATA, 32,(1987) N 1, 131-132
作者:GUPTA K. C.、 PATHAK P. K.、 SAXENA B. K.、 SRIVASTAVA N.、 PANDEY K.
DOI:——
日期:——
PROCESS AND COMPOSITIONS FOR ENHANCING RELIABILITY OF EXOGENOUS CHEMICAL SUBSTANCES APPLIED TO PLANTS
申请人:MONSANTO COMPANY
公开号:EP0975224A1
公开(公告)日:2000-02-02
LIGHT ACTIVATED SHAPE MEMORY CO-POLYMERS
申请人:CORNERSTONE RESEARCH
GROUP, INC.
公开号:EP1799771A2
公开(公告)日:2007-06-27
Light Activated Shape Memory Co-Polymers
申请人:Tong Hung Tat
公开号:US20080021166A1
公开(公告)日:2008-01-24
The present discovery uses monomers which contain reversible photo-crosslinkable groups in addition to primary polymerizable groups. The mechanical properties of these materials and the reversibility of the photo-activated shape memory effect demonstrate the effectiveness of using photo-irradiation to effect change in modulus and shape memory effect. In the preferred embodiment the reaction mixture includes a photo-reactive monomer comprising a photo reactive group and a polymerizable group; a second monomer, which is more preferably a mixture of monomers, which are acrylate based; a multi-functional crosslinking agent, preferably 1,6 hexanediol diacrylate (HDODA); an initiator, preferably a free radical initiator; and a fifth, optional, component which is a modifying polymer. The mixture of the second monomer, crosslinking agent, and initiator comprise the base polymer matrix into which the photo-reactive monomer is incorporated. The polymeriziable group of the photo reactive monomer allows the photo reactive monomer to polymerize with the base polymer matrix.