METHOD FOR PREPARING HALOGEN-SUBSTITUTED STYRENE MONOMER

WIPO Patent Application WO/2019/031743

A1

The present specification provides a method for preparing a styrene monomer, comprising, as a step of preparing a styrene monomer of chemical formula 2 by reacting a compound represented by chemical formula 1 in the presence of phosphoric acid, a step of using 100 mol% or more of the phosphoric acid on the basis of 100 mol% of the compound represented by chemical formula 1.

KANG BYUNGSOO (KR)
KONG MYUNG JIN (KR)
LEE HYUNJIK (KR)
LEE WONJAE (KR)

PCT/KR2018/008563

February 14, 2019

July 27, 2018

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LG CHEMICAL LTD (KR)

C07C17/42; C07C17/35; C07C25/28

US4466904A	1984-08-21
CN101781161A	2010-07-21

YARWOOD, T. D.: "Synthetic applications of fluorinated phenyllithiums Preparation of fluorinated a-methylstyrenes, benzhydrols, benzophenones and aryltrimethylsilanes", JOURNAL OF FLUORINE CHEMISTRY, vol. 78, 1996, pages 113 - 119, XP004020651, DOI: doi:10.1016/0022-1139(96)03424-0
DAS, P.: "A direct synthesis of functionalized styrenes and terminal 1,3-dienes via aqueous Wittig chemistry with formalin", TETRAHEDRON LETTERS, vol. 52, 2011, pages 199 - 201, XP027549739
TAKEMOTO, M.: "Synthesis of styrenes through the decarboxylation of trans-cinnamic acids by plant cell cultures", TETRAHEDRON LETTER, vol. 40, 1999, pages 6595 - 6598, XP004173968, DOI: doi:10.1016/S0040-4039(99)01281-2

CHUNG, Soon-Sung (KR)

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