Preparation of some 4‐ or 5‐substituted 2‐tert.butylbenzoic acids. CopyCopied, InChI=1S/C22H19Br/c1-2-17-13-15-20(16-14-17)22(23)21(18-9-5-3-6-10-18)19-11-7-4-8-12-19/h3-16H,2H2,1H3 1. 4-ethyl bromobenzene. Toluene can be dried by distilling 10-15% and cooling the remaining toluene under nitrogen. 8, 28-58 (1954), Preparation of Grignard reagents: Y. H. Lai, Synthesis 1981, 585-604. One can overcome this problem by using a mixture of chloro (80-90%) and bromo substrate (20-10%).
1-(1-Bromo-2,2-diphenylvinyl)-4-ethylbenzene, CCc1ccc(cc1)C(=C(c2ccccc2)c3ccccc3)Br This page has been viewed approximately 16943 times since records began. This would remove any water present as azeotrope. After complete addition, reflux for 2 h under nitrogen atmosphere. 6. This is normally pure by NMR. Magnesium turnings (14.5 g, 0.6 mol) added all at once. Magnesium can be dried at 70-80 ofor 2-3 h for better initiation.
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