Trivinyl benzene

The coupling reaction of zinc(II) (3- or)8-monobromodeuteroporphyrin dimethyl ester (ID with 1,4-divinylbenzene under the typical conditions of the Heck reaction results in the formation of dimeric porphyrin 12 linked via a divinylbenzene moiety. Use of 1,3,5-trivinyl-benzene in the same reaction makes the trisadduct available."5... 

Trivinyl benzene may be utilized in a hydroamination/carbocyclization process that is initiated by an intramolecular anft -Markovnikov addition of n-propylamine followed by an intramolecular hydroamination and a highly diastereoselective car-bocyclization step (44) [100]. 

The most commonly used suspending agents are cellulose derivatives, poly-aciylate salts, starch, poly(vinyl alcohol), gelatin, talc, and clay derivatives (95). The important function these agents must serve is to prevent the coalescence of monomer droplets during the course of the polymerization (114). Thickeners can also be added to improve suspension quality (95). Other additives such as lauryl alcohol, stearyl acid or cetyl alcohol lubricants and di- or trivinyl benzene, dial-lyl esters of dibasic acids, and glycol dimethacrylates cross-linkers are used to improve bead imiformity and bead performance properties. 

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