Construction of a γ-Butyrolactone Moiety: A Facile Synthesis of 3&bgr;- Hydroxy-5,6-Dihydro-17&bgr; -Methoxy-Pregnan-21,16&agr;-Carbalactone - a New D-Ring Fused Steroidal γ-Butyrolactone from an Abundant 20- Oxopregnane using Metal Mediated Halogenation as the Key Step

Publisher： Bentham Science Publishers

E-ISSN： 1875-6255|12|8|566-573

ISSN： 1570-1786

Source： Letters in Organic Chemistry, Vol.12, Iss.8, 2015-01, pp. : 566-573

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