L Claisen 1912 + aza-Claisen + Overman 1976; modern modern foundational text + asymmetric-catalysis Pd-Overman 1990s + sigmatropic.
L Claisen 1912 + aza-Claisen + Overman 1976; modern modern foundational text + asymmetric-catalysis Pd-Overman 1990s + sigmatropic.