The invention discloses a green and environment-friendly
tenofovir preparation method which comprises the following steps: dissolving a compound I, S-
propylene carbonate and an inorganic
weak base inan
organic solvent, reacting for 3-6 hours at 85-120 DEG C, cooling to
room temperature, and concentrating an obtained
system under reduced pressure to obtain an intermediate II; dissolving the intermediate II, hydroxymethylphosphonic acid dialkyl ester and trialkyl (
aryl)
phosphine in an
organic solvent, stirring at
room temperature, slowly adding azodicarboxylic acid diester, and reacting for 20minutes to 3 hours to obtain an intermediate III; slowly adding an inorganic strong alkali into the intermediate III, carrying out ice bath, filtering, adjusting the pH value of an obtained filtrate,standing, carrying out suction
filtration, washing an obtained
filter cake, and carrying out
vacuum drying under reduced pressure. According to the method, S-
propylene carbonate, adenine and derivatives thereof are taken as initial raw materials; PMPA is generated through configuration inversion of
Mitsunobu reaction, the used organic solvents can be recycled, the generated
wastewater is mainly aharmless inorganic
salt solution, the cost for further treatment and up-to-standard
discharge is low, the method is
environmentally friendly, the reaction is easy to control, the safety is high, andthe comprehensive economic benefit is high.