Ultrasound-Assisted Expedient and Green Synthesis of a New Series of Diversely Functionalized 7Aryl/Heteroarylchromeno[4,3d]pyrido[1,2a]pyrimidin-6(7H)ones via One-Pot Multicomponent Reaction Under Sulfamic Acid Catalysis at Ambient Conditions

doi 10.1021/acssuschemeng.8b02448.s001