Nature CommunicationsHFIP-assisted Brønsted acid-catalyzed ring opening of 1-azabicyclo[1.1.0]butane to access diverse C3-quaternary aza-azetidines and indole-azetidinesSubrata HazraArushi TyagiTuhin DuttaRupam SahooBoudhayan BandyopadhyayGarima JindalSantanu Panda2025-09-30Full textDOI https://doi.org/10.1038/s41467-025-63680-z