S1 Supplementary Information Chemoenzymatic preparation of optically active cyclic 4-hydroxy- acylazyridines Saúl Silva and Christopher D. Maycock * Instituto de Tecnologia Quı́mica e Biológica António Xavier, Universidade Nova de Lisboa, EAN, 2780-157 Oeiras, Portugal and Departamento de Quı́mica e Bioquı́mica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal * Email: maycock@itqb.unl.pt Contents: Table 1 – Enzymic resolution using different reaction conditions. S2 General S3 Synthesis and characterization of compounds S3-S11 References S11 Copies of the 1 H (400 MHz) and 13 C (101 MHz) APT NMR spectra for compounds 13-26, 4-(TBSO)- cyclohept-2-en-1-one, 4-(TBSO)-2-iodocyclohept-2-en-1-one. S12-S28 Copies of the chromatograms for compounds 17-21. S29-S33 Electronic Supplementary Material (ESI) for Organic Chemistry Frontiers. This journal is © the Partner Organisations 2017