Others pivot from both bottom (like a hopper) and the side (like a casement). Also called Dual Action. Double-Hung Windows: Include offset upper and lower sashes, which can both move up and down in the frame. A window having two vertically sliding sash, each closing a different part of the window.
Reaction of sugar oxazolines with primary amines. In order to scrutinize the reaction pathway and structure of the reaction product, we started with a simple sugar oxazoline and a primary amine, carrying no other functional groups.
A variety of amines and nitrogen heterocycles are useful bases of moderate strength (pKa of conjugate acid around 10-13) 1  N,N-Diisopropylethylamine, or DIPEA (also called HÃ¼nig's Base) 2  1,8-Diazabicycloundec-7-ene, or DBUâa favorite for the E2 elimination reaction.  2,6-Di-tert-butylpyridine, a weak non-nucleophilic base.