Bis(trimethylsilyl)carbodiimide → HCID 178511856, compound

Participants

Reaction Steps

To a solution of 6-bromo-3-fluoro-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (220 mg, 0.65 mmol) in anhydrous DCM was added TiCl4 (1 M in DCM, 1.4 mL) dropwise within 15 minutes at room temperature. After addition, the mixture was stirred for 1 h. To this mixture was added N,N′-methanediylidenebis(1,1,1-trimethylsilanamine) (264 mg, 1.42 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water and extracted with DCM. The combined organic phases were dried over anhydrous Na2SO4, filtered, and the filtrate was concentrated to give crude product, which was used in the next step without further purification.

Provenance & Evidence