Six monoprotected acetals and-thioacetals of glutaradehyde and its symmetrical dimethyl derivatives were synthesized. Microwave-assisted heating proved to be a substantially more selective method for monoprotection than conventional heating. All reactions were efficient and only traces of diprotected material were formed.
[Yamaoka, Nagahisa; Kawano, Yasuhiko; Izuhara, Yuko; Miyata, Toshio; Meguro, Kanji Chemical and Pharmaceutical Bulletin, 2010 , vol. 58, # 5 p. 615 - 619]