Iridium-catalyzed Synthesis of Saturated N-Heterocycles from Aldehydes and SnAP Reagents with Continuous Flow Photochemistry

ISSN:1523-7060ISSN:1523-705

Iridium-catalyzed Synthesis of Saturated N‑Heterocycles from Aldehydes and SnAP Reagents with Continuous Flow Photochemistry

Commercially available tin amine protocol (SnAP) reagents provide a simple approach to the synthesis of a wide variety of saturated N-heterocycles from aldehydes. In this report, we disclose that the copper­(II) promoter and hexafluoroisopropanol can be replaced by photocatalytic conditions using Ir­[dF­(CF₃)­ppy]₂(dtbbpy)­PF₆ in CH₃CN. Continuous flow photochemical conditions provide a clean, scalable approach to valuable products including morpholines, piperazines, thiomorpholines, diazepanes, and oxazepanes from aldehyde starting materials

High-throughput synthesis provides data for predicting molecular properties and reaction success

Data and code to accompany the publication. Data S1 through S3 are described in the supplementary materials. The virtual library is contained in virtual_library.tar, a tar-archive containing bzip2-compressed CSV files each holding a chunk of 10,000 records for a total of 17,482,092 records. Each record has a unique identifier "mol_number". For each chunk, two files are provided: VL_chunk_xxxx_smiles.csv contains only the identifier and the respective SMILES string. The second file, VL_chunk_xxxx.csv additionally contains the predictions made for the library members. In addition to the identifier and SMILES string, the columns of VL_chunk_xxxx.csv are: - MoKa calculations: [number_of_ionizable_centers, center1_acidorbase, center1_pKa, center1_atom_number, center1_prediction_quality, center2_acidorbase, center2_pKa, center2_atom_number, center2_prediction_quality, center3_acidorbase, center3_pKa, center3_atom_number, center3_prediction_quality, center4_acidorbase, center4_pKa, center4_atom_number, center4_prediction_quality, center5_acidorbase, center5_pKa, center5_atom_number, center5_prediction_quality, center6_acidorbase, center6_pKa, center6_atom_number, center6_prediction_quality, center7_acidorbase, center7_pKa, center7_atom_number, center7_prediction_quality, center8_acidorbase, center8_pKa, center8_atom_number] - Property predictions using Novartis' model: [predicted_logD_pH7.4, predicted_logSolubility_pH6.8_(mM), predicted_ionization_constant] - Property predictions using Schrödinger: [QPlogPo/w, QPlogS]. These are calculated for the all-cis diastereomer. - Reaction outcome predictions for up to two possible reactions leading to the product: [rxn1_smiles, rxn1_predictions, rxn1_confidence, rxn2_smiles, rxn2_predictions, rxn2_confidence