Mandelic acids represent a key structural motif present in many drug molecules. Herein, we report the controlled meta-selective mono- and diolefination of mandelic acids by the careful design of the substrate and oxidant. Furthermore, free meta-functionalized mandelic acid was generated by selectively removing the template under mild basic conditions. The synthesis of functionalized homatropine and
Alkyl phenylglyoxylates as radical photoinitiators creating negative photoimages1
作者:Shengkui Hu、Douglas C. Neckers
DOI:10.1039/a701797i
日期:——
Alkyl phenylglyoxylates are shown to be efficient photoinitiators for
acrylate polymerization. Benzoyl and phenyl radicals derived from
intermolecular hydrogen abstraction are the initiating species. A negative
photoimage system was developed based on this observation. The imaging
material consists of a polymeric phenylglyoxylate initiator and
to-be-crosslinked diacrylate monomers. The contrast and sensitivity of
this system have been measured.