Preparation method of trans-1, 3-dioxane liquid crystal compound

• Main Authors: WANG ZHIQIANG, CHEN SHAOHUA, YU KAI, GUAN DENGSHI, WANG LIMIN, ZHANG MIAOMIAO, DING QIUYUE, MENG ZHONGRONG, YU JING, YUE GANG
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2023
• Subjects: ADHESIVES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; DYES; HETEROCYCLIC COMPOUNDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC CHEMISTRY; PAINTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; POLISHES; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to the technical field of liquid crystal compound synthesis, and particularly discloses a preparation method of a trans-1, 3-dioxane liquid crystal compound, which comprises the following steps: by taking imidazole trifluoromethanesulfonate ionic liquid as a catalyst, carrying out dehydration and transposition reaction on a diol compound as shown in a formula (I) and an aldehyde compound as shown in a formula (II) to obtain the trans-1, 3-dioxane liquid crystal compound. A compound shown in the formula (III) is obtained; the trans-1, 3-dioxane liquid crystal compound as shown in a formula (V) is obtained by carrying out Suzuki reaction on a compound as shown in a formula (III) and a phenylboronic acid compound as shown in a formula (IV) by taking alkali metal salt and palladium salt as catalysts and carrying out Suzuki reaction on the compound as shown in the formula (III) and the phenylboronic acid compound as shown in the formula (IV). The preparation method of the trans-1, 3-dioxane l