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Problems associated with low solubility of tadalafil in ethanol and most of other organic solvents resulted in the need of large quantities of solvents required to perform synthesis and crystallization of tadalafil at industrial scale, which have unwanted technological, environmental and economical impact. 5 859 006 describes the synthesis of the tadalafil and its intermediate (A) which involves reacting D-tryptophan methyl ester with a piperonal in the presence of dichloromethane and trifluoroacetic acid which provides a mixture of desired cis and undesired trans isomer of intermediate A with poor selectivity. Tadalafil (Cialis) is created and marketed by the Eli Lilly business. This medicine is used to deal with male impotence, or erectile disorder. In many cases guys being managed for impotence are recommended the 10 mg dosage that must be taken when required. 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Tadalafil is an oral drug that is used for treating impotence the inability to attain or maintain a penile erection and benign prostatic hyperplasia is in a class of drugs called phosphodiesterase-5 PDE5 inhibitors that also includes sildenafil and vardenafil.