摘要:
There are disclosed herein novel derivatives of 26,26,26,27,27,27-hexafluorovitamin D 3 providing excellent pharmacological effects, and a process for the preparation thereof. These novel compounds are represented by the general formula wherein R 1 , R 2 , R 3 , R 3 ', R 4 and R 4 ' are defined as in the claims.
摘要:
There are disclosed herein novel derivatives of 26,26,26,27,27,27-hexafluorovitamin D 3 providing excellent pharmacological effects, and a process for the preparation thereof. These novel compounds are represented by the general formula wherein R 1 , R 2 , R 3 , R 3 ', R 4 and R 4 ' are defined as in the claims.
摘要:
Described are novel compounds of the formula (IV) wherein R 1 is a hydrogen atom, a nyaroxyl group or a protected hydroxyl group and R 2 is a hydrogen atom or a protecting group,
a pharmaceutical composition useful as a cell differentiation-inducing agent, which contains an effective amount of a compound of the formula IV (wherein R 2 is H) as an active ingredient and a pharmaceutically acceptable carrier or diluent, a method of inducing cell differentiation by administering an effectiveamount of a compound of the formula IV (wherein R 2 is H to a patient, and a proceesfor producing a compound of the formula (IV) by subjecting a previtamin D 3 derivative of the formula (III)
wherein R 1 and R 2 are as defined above, to thermal isomerization to yield a vitamin D 3 derivative of the formula (IV) mentioned above.
摘要:
There are disclosed novel derivatives of 26,26,26,27,27,27-hexafluorovitamin D₃ having a fluorine atom at the 23- and/or 24-position which have an excellent pharmacological activity and a process for production thereof. The novel compounds are represented by the general formula (1). wherein R₁ʹ denotes a hydrogen atom, a hydroxyl group or a protected hydroxyl group, R₂ denotes a hydrogen atom or a protecting group for a hydroxyl group, R₃ denotes a hydrogen atom, a fluorine atom, a hydroxyl group or a protected hydroxyl group and R₄ and R₄ʹ each denotes a hydrogen atom, or one of them denotes a hydrogen atom and the other denotes a fluorine atom, hydroxyl group or a protected hydroxyl group or R₄ and R₄ are combined to denote an oxo group, with a proviso that at least one of R₃, R₄ and R₄ʹ denotes a fluorine atom. The process for production thereof comprises subjecting a compound represented by the general formula (3) wherein R₁ʹ, R₂, R₃, R₄ and R₄ʹ are the same as defined above, to thermal isomerization and optionally further to a deprotection reaction.
摘要:
A process for preparing sulfone derivatives of the formula: wherein R¹ and R² are each a hydrogen atom, a lower alkyl group or a substituted or unsubstituted cyclo(lower)alkyl, cyclo(lower)alkylmethyl, lower alkenyl, heterocyclic, aryl or ar(lower)alkyl group, R⁴, R⁵, R⁶ and R⁷ are each a hydrogen atom, a lower alkyl group, a lower alkenyl group or a substituted or unsubstituted aryl grcup and Az is a 1,2,4- or 1,3,4-triazole or imidazole ring, which comprises subjecting a sulfide or sulfoxide compound of the formula: wherein R¹, R², R⁴, R⁵, R⁶, R⁷ and Az are each as defined above and n is an integer of 0 or 1 to oxidation with an oxidizing agent in the presence of a metal catalyst.