"' Pipoxizine "'( structurally to antihistamines of the diphenylmethane / piperazine family.
2.
In the winter of 1937-38, Erhart and Bockm�hl began the synthesis of over 300 compounds which contained diphenylmethane as a central structural element.
3.
An important exception to this is polymeric diphenylmethane diisocyanate, which is a mixture of molecules with two, three, and four or more isocyanate groups.
4.
Exposure to oxygen ( diradical ) converts this carbene to the corresponding benzophenone and the diphenylmethane compound is formed when it is trapped by 1, 4-cyclohexadiene.
5.
The aromatic isocyanates, diphenylmethane diisocyanate ( MDI ) or toluene diisocyanate ( TDI ) are more reactive than aliphatic isocyanates, such as hexamethylene diisocyanate ( HDI ) or isophorone diisocyanate ( IPDI ).
6.
Synthetic fixatives include substances of low volatility ( diphenylmethane, cyclopentadecanolide, ambroxide, benzyl salicylate ) and virtually odorless solvents with very low vapor pressures ( benzyl benzoate, diethyl phthalate, triethyl citrate ).
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