Tetra hydroxy butane

The tetra-hydroxy compound, viz., tetra-hydroxy butane, or 1-2-3-4-butan-tetr-ol, is known as erythritol or er3rthrite. It occurs free in nature in certain algae and also as erjrthrin, an ester of an aromatic acid, in certain lichens. It is a crystalline substance, melting at 126° and boiling at 329°. It is easily soluble in wate r and slightly in alcohol. 

Hydroxy- butan 5-0xo-2-methyl-2-dthyl- 3-Carboxy-tetra- hydrofuran 57 ... 

The reaction is usually performed at low temperature, typically 20-50 °C, in order to avoid a reaction of the tin complex with the hydroxy groups of the support, as shown by solid-state C CP-MAS NMR. Indeed, it has been shown that tetra-n butyl tin or tributyl tin hydride reacts, above ca. 150 °C with the hydroxy groups of silica, siUca-alumina or alumina with formation of a surface grafted =M-0-Sn(n- 4119)3 fragment and evolution of butane or hydrogen [61, 109-111] (Scheme 18.5). 

Chemical name poly[[6-[(1,1,3,3-tetramethylbutyl) amino]-1,3,5-triazine-2,4-diyl] [(2,2,6,6-tetramethyl-4-piperidinyl) imino]-1,6-hexanediyl[(2,2,6,6-tetra-methyl-4-piperidinyl)imino]]) + butane-dioic acid, dimethylester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol ... 

Tris(2-methyl-4-hydroxy-5-/ r/-butylphenyl)butane Tetra-tris-methylene-3-(3, 5 -di-/m-butyl-4 -hydroxyphenyl)propionate methane... 

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