Bis(4,5-dimethoxy-2-nitrophenyl)ethylene glycol: a new and efficient photolabile protecting group for aldehydes and ketones

Add time:07/19/2019    Source:sciencedirect.com

Synthesis of a new photolabile protecting group, bis(4,5-dimethoxy-2-nitrophenyl)ethylene glycol (4) from 4,5-dimethoxy-2-nitrobenzyl alcohol in three steps in good yields is described. The acetals and ketals of 4 are stable against acidic and basic reaction conditions and are cleaved smoothly on irradiation at 350 and 400 nm with regeneration of carbonyl compounds in high yields and efficiency.

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