3-chloro-3-methyl-butane-1,4-dial-bis- acetals and...

Details 3-chloro-3-methyl-butane-1,4-dial-bis- acetals and... 3-chloro-3-methyl-butane-1,4-dial-bis- acetals and...

C - Chemistry, Metallurgy

07

D

260/353.5

C07D 319/06 (2006.01)

Patent

CA 1130811

Abstract of the disclosure: 3-Chloro-3-methyl-butane- 1,4-dial-bis-acetals and 3-methyl-but-2-ene-1,4-dial- bis-acetals are obtained by reacting a six-membered cyclic acetal of 3-methyl-but-3-en-1-al with an alkyl nitrite in the presence of methanol and hydrogen chloride and, if desired, eliminating HCl in the conventional manner. The butan-dial-bis-acetals and butenedial-bis- acetals are valuable intermediates through which the trans-3-methyl-but-2-ene-1,4-dial-1-ecetals, which are sought-after products for terpene syntheses, can be ob- tained in an industrially particularly advantageous manner.

335668

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