NOVELTY - 3(beta),5(beta)-Dihydroxy-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androst-17-one (II) is protected to produce 3(beta)-pivaloyloxy,5-hydroxy-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androst-17-one (III), and reacted with propargyl ester (IV) to produce 17(alpha)-(2-alkoxycarbonyl)-ethynyl-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androstane-3(beta)-pivaloyloxy,5(beta),17(beta)-dihydroxy (V). The compound (V) is hydrogenated, oxidized, lactonized and dehydrated, to obtain 6(beta),7(beta);15(beta ),16(beta)-dimethylene-3-oxo-17(alpha)-pregn-4-ene-21,17-carbolactone (drospirenone).    USE - Preparation of drospirenone used in oral pharmaceutical composition as contraceptive drug.    ADVANTAGE - The method enables preparation of drospirenone with high purity and productivity by safe, economical, environmentally-friendly and simple process, does not use toxic reagent.    DETAILED DESCRIPTION - 3(beta),5(beta)-Dihydroxy-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androst-17-one (II) is protected to produce 3(beta)-pivaloyloxy,5-hydroxy-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androst-17-one of formula (III). The compound (III) is reacted with propargyl ester of formula (IV) to produce 17(alpha)-(2-alkoxycarbonyl)-ethynyl-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androstane-3(beta)-pivaloyloxy,5(beta),17(beta)-dihydroxy of formula (V). The compound (V) is hydrogenated to produce 17(alpha)-(2-alkoxycarbonyl)-ethyl-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androstane-3(beta)-pivaloyloxy-5(beta),17(beta)-dihydroxy of formula (VI). The compound (VI) is deprotected and hydrolyzed to obtain 17(alpha)-(3-propanoic acid)-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androstane-3(beta),5(beta),17(beta)-trihydroxy of formula (VII). The obtained compound (VII) is oxidized to obtain 17(alpha)-(3-propanoic acid)-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androstane-3-oxo-5,17(beta)-dihydroxy of formula (VIII). The resultant compound (VIII) is lactonized and dehydrated to obtain 6(beta),7(beta);15(beta),16(beta)-dimethylene-3-oxo-17(alpha)-pregn-4-ene-21,17-carbolactone (drospirenone) of formula (I).    R=1-4C alkyl.    INDEPENDENT CLAIMS are included for the following:    (1) 17(alpha)-(2-alkoxycarbonyl)-ethynyl-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androstane-3(beta)-pivaloyloxy,5(beta),17(beta)-dihydroxy (V);    (2) method for preparing 17(alpha)-(2-alkoxycarbonyl)-ethynyl-(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androstane-3(beta)-pivaloyloxy,5(beta),17(beta)-dihydroxy (V);    (3) 17(alpha)-(2-alkoxycarbonyl)-ethyl-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androstane-3(beta)-pivaloyloxy-5(beta),17(beta)-dihydroxy (VI); and    (4) method for preparing 17(alpha)-(2-alkoxycarbonyl)-ethyl-6(beta),7(beta),15(beta),16(beta)-dimethylene-5(beta)-androstane-3(beta)-pivaloyloxy-5(beta),17(beta)-dihydroxy (VI).