Data Documentation for the supplemetary material of the article "Synthesis of spirolactones from carbonyls via carboborylation of N-sulfonylhydrazones with alkoxycarbonylalkylboronic acids". Advanced Synthesis and Catalysis, doi:10.1002/adsc.202500170 General Information Supplementary information for the article "Synthesis of spirolactones from carbonyls via carboborylation of N-sulfonylhydrazones with alkoxycarbonylalkylboronic acids". Advanced Synthesis and Catalysis, doi:10.1002/adsc.202500170. The data are contained in a word .docx file with the chemdraw and NMR data embebed. NMR data in mestrenova format can be retrieved from the file. A zip file containing all the NMR data is also provided. Name of dataset: SI-ASC-10.1002-adsc.202500170 Name of data files in data set: SI-ASC-10.1002-adsc.202500170.docx NMR-ASC.zip Dataset language: English Date the data set was last modified: 23-04-2025 Funder: Financial support of this work by Ministerio de Ciencia e Innovación of Spain (Agencia Estatal de Investigación: grant MCINN-23-PID2022-140635NB-I00 financed by MCIN/AEI /10.13039/501100011033/FEDER, UE) and Agencia de Ciencia, Competitividad Empresarial e Innovación del Principado de Asturias (Sekuens): grant IDE/2024/000709. How to cite data: López, L; Filgueira, S; Mª P. Cabal, Valdés, C."Synthesis of spirolactones from carbonyls via carboborylation of N-sulfonylhydrazones with alkoxycarbonylalkylboronic acids". Adv. Synth. Catal. doi:10.1002/adsc.202500170. Methodology for data collection: Data collector(s): Lucía López, Sara Filgueira Date of data collection: 2023-2025 Person to contact with questions: Carlos Valdés Data entry: 12-05-2025 Software (including version #) used to prepare data set: MSword, Chemdraw22.2, MestreNova 14 Data processing that was performed: NMR FIDs were processed with MestreNova, copied and pasted in the Word document Variables File Overview SI-ASC-10.1002-adsc.202500170.docx: a .docx file containing all the experimental and NMR data,: NMR mestrenova files can be retrieved from the document. NMR-ASC.zip: a zip file containing the NMR data. There is one folder for each compound named with the numbers of the publication. Each folder contains independent folders for the 1H NMR data (1) and the 13C NMR data (2).