The invention relates to a process for the synthesis of d-(17α)-13-ethyl-17-hydroxy-18,19-dinorpregn-4-ene-20-yn-3-one-oxime (also known as norelgestromin) via acetylation of d-norgestrel at position 17; oximation of the oxo group at position 3 of the obtained d-(17α)-13-ethyl-17-(acetyloxy)-18,19-dinorpregn-4-ene-20-yn-3-one; and then hydrolyzing the acetyloxy group at position 17 of the obtained d-(17α)-13-ethyl-17-(acetyloxy)-18,19-dinorpregn-4-ene-20-yn-3-oxime derivative, thereby obtaining norelgestromin.
该发明涉及一种合成d-(17α)-13-乙基-17-羟基-18,19-二诺孕烷-4-烯-20-炔-3-酮
肟(也称为诺莫酮)的方法,通过在17位对d-诺鲁
孕酮进行乙酰化;在得到的d-(17α)-13-乙基-17-(乙酰氧基)-18,19-二诺孕烷-4-烯-20-炔-3-酮的3位的酮基进行氧化反应;然后
水解所得的d-(17α)-13-乙基-17-(乙酰氧基)-18,19-二诺孕烷-4-烯-20-炔-3-酮
肟衍
生物的17位的乙酰氧基,从而获得诺莫酮。