Improved synthesis of 18-hydroxydeoxycorticosterone

Area of Science:

• Organic Chemistry
• Steroid Chemistry
• Synthetic Chemistry

Background:

• Steroid hormones play crucial roles in human physiology.
• Efficient synthesis of modified steroids is essential for research and therapeutic development.

Purpose of the Study:

• To develop a synthetic pathway for 18-hydroxyprogesterone and 18-hydroxydeoxycorticosterone.
• To explore the utility of hypoiodite photolysis and subsequent transformations in steroid synthesis.

Main Methods:

• Hypoiodite photolysis of a pregnene derivative to form a lactone.
• Lithium aluminum hydride reduction of the lactone to a trihydroxy steroid.
• Oppenauer oxidation to yield 18-hydroxyprogesterone.
• Lead tetraacetate oxidation and saponification to obtain 18-hydroxydeoxycorticosterone.

Main Results:

• The synthesis yielded 3beta-acetoxy-5-pregnene-18,20-lactone in 46% yield.
• Lithium aluminum hydride reduction afforded 3beta, 18,20beta-trihydroxy-5-pregnene in 91% yield.
• Oppenauer oxidation produced 18-hydroxyprogesterone (66% yield).
• Lead tetraacetate oxidation and saponification yielded 18-hydroxydeoxycorticosterone (58% yield).

Conclusions:

• A viable synthetic route to 18-hydroxyprogesterone and 18-hydroxydeoxycorticosterone was established.
• The described methods demonstrate effective functionalization of the pregnene skeleton.