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.
Ir(III)-Catalyzed Oxidative Annulation of Phenylglyoxylic Acids with Benzo[<i>b</i>]thiophenes
作者:Zhigang Wang、Mufan Yang、Yudong Yang
DOI:10.1021/acs.orglett.8b01033
日期:2018.5.18
An Ir(III)-catalyzed oxidative annulation of phenylglyoxylic acids with benzo[b]thiophenes for the construction of benzothieno[3,2-c][2]benzopyranones in one step is disclosed. Three C–H cleavages and C–C/C–O bondformations are involved in this reaction. This protocol features a relatively broad substrate scope, good functional group tolerance, good regioselectivities, mild reaction conditions, and
公开了一种Ir(III)催化的苯乙醛酸与苯并[ b ]噻吩的氧化环化反应,用于一步法构建苯并噻吩并[3,2- c ] [2]苯并吡喃酮。该反应涉及三个C–H裂解和C–C / C–O键的形成。该方案具有相对较宽的底物范围,良好的官能团耐受性,良好的区域选择性,温和的反应条件和按比例放大的合成。
Benincori, Tiziana; Pagani, Silvia Bradamante; Fusco, Raffaello, Journal of the Chemical Society. Perkin transactions I, 1988, p. 2721 - 2728