Bis(<i>o</i>-nitrophenyl)ethanediol: A Practical Photolabile Protecting Group for Ketones and Aldehydes
作者:Aurélien Blanc、Christian G. Bochet
DOI:10.1021/jo026347x
日期:2003.2.1
The ketals of bis(o-nitrophenyl)ethanediol and ketones or aldehydes are smoothly deprotected in neutral conditions by irradiation with 350 nm light. The chemical stability in basic, acidic, and oxidizing media makes this form of protection orthogonal to classical protectinggroups. Both racemic and enantiopure forms are readily available in two steps from inexpensive starting materials.