The condensation reaction of ethyl 4-oxo-4H-benzo[d][1,3]oxazine-2-carboxylates with acidic solution of potassium cyanate offers a novel and expedient route to the synthesis of 2,4(1H,3H)-quinazolinediones under mild reaction conditions.
A facile and convenient approach for the one-pot synthesis of 2,4(1H,3H)-quinazolinediones
作者:Mahnaz Sharafi-Kolkeshvandi、Farzad Nikpour
DOI:10.1016/j.cclet.2012.01.027
日期:2012.4
Abstract A fast and efficient method is described for the one-pot synthesis of 2,4(1 H ,3 H )-quinazolinediones by cyclization reaction of anthranilic acid derivatives with potassium cyanate and acetic acid in PEG. Good to high yields of the products obtain in short reaction times with simple work-up.
The present invention provides a heterocyclic compound having an RORγt inhibitory action.
The present invention relates to a compound represented by the formula (I):
wherein
Ar is a the partial structure (1) to the partial structure (5),
Q is a bivalent group selected from the group consisting of (Ia)-(If), and
B is a ring optionally having substituent(s),
or a salt thereof.