Synfacts, Table of Contents Synfacts 2019; 15(03): 0260DOI: 10.1055/s-0037-1612244 Metals in Synthesis © Georg Thieme Verlag Stuttgart · New YorkLewis-Acid-Driven N- or O-Cyclization of Urea-Tethered Cyclobuta[b]indolinesContributor(s): Mark Lautens , Randy SanicharRecommend Article Abstract Buy ArticleKey words Key wordsheterocycles - polyheterocycles - N-cyclization - O-cyclization Full Text