摘要:
A process for conveniently and efficiently preparing a 2,6-halogenopurine using an inexpensive starting material. A process for preparing a 2,6-dihalogenopurine, comprising treating a 2-amino-6-halogenopurine having a protective group at 7th position or 9th position with a diazotizating agent and a halogen source; and a process for preparing a 9-acyl-2-amino-6-halogenopurine, comprising treating a 2-amino-6-halogenopurine with an acylating agent in the presence of a base.
摘要:
A process for conveniently and efficiently preparing a 2,6-dihalogenopurine using an inexpensive starting material. A process for preparing a 2,6-dihalogenopurine, comprising treating a 2-amino-6-halogenopurine having a protective group at 7th position or 9th position with a diazotizating agent and a halogen source; and a process for preparing a 9-acyl-2-amino-6-halogenopurine, comprising treating a 2-amino-6-halogenopurine with an acylating agent in the presence of a base.
摘要:
A process for conveniently and efficiently preparing a 2,6-dihalogenopurine using an inexpensive starting material. A process for preparing a 2,6-dihalogenopurine, comprising treating a 2-amino-6-halogenopurine having a protective group at 7th position or 9th position with a diazotizating agent and a halogen source; and a process for preparing a 9-acyl-2-amino-6-halogenopurine, comprising treating a 2-amino-6-halogenopurine with an acylating agent in the presence of a base.
摘要:
By reacting the compound of the formula [Ia] or [Ib] with halosilane compound and an agent for diazo reaction, 2,6-dihaliopurine of the formula [II] can be produced conveniently in a high yield and can be easily isolated, wherein each symbol is as defined in the specification.
摘要:
The present invention relates to alkynylpurine compounds represented by the following formula (I-1) and the formula (I-2): wherein each symbol is as defined in the present specification, salts thereof, and production methods thereof. According to the present invention, a method of producing an alkynylpurine compound and a salt thereof useful as an intermediate for medicament production safely, conveniently and economically from the corresponding purine compound and a salt thereof, as well as an alkynylpurine compound and a salt thereof useful as an intermediate for production of medicaments can be provided.
摘要:
By reacting the compound of the formula [Ia] or [Ib] with halosilane compound and an agent for diazo reaction, 2,6-dihalopurine of the formula [II] can be produced conveniently in a high yield and can be easily isolated, wherein each symbol is as defined in the specification
摘要:
A process for preparing 2,6-dichloropurine including chlorinating 2-amino-6-chloropurine with a chlorine source in the presence of a diazotizating agent.
摘要:
The present invention can provide a solvate, a cubic crystal and a columnar crystal of 2-amino-6-benzyloxypurine by crystallization from (1) a solvent containing at least one kind of solvent selected from the group consisting of alcohol and water, (2) alcohol or (3) a water-containing solvent.
摘要:
The present invention can provide a solvate, a cubic crystal and a columnar crystal of 2-amino-6-benzyloxypurine by crystallization from (1) a solvent containing at least one kind of solvent selected from the group consisting of alcohol and water, (2) alcohol or (3) a water-containing solvent.
摘要:
Process for preparing 1,3-disubstituted urea of the formula: ##STR1## wherein R.sup.5 is the same as or different from R.sup.6, and each of R.sup.5 and R.sup.6 is independently linear or branched, alkyl of 1-20 carbon atoms, alkenyl group having 2 to 20 carbon atoms or alkynyl group having 2 to 20 carbon atoms, which may have phenoxy, alkoxy of 1-13 carbon atoms, monocycloalkyl of 3-8 carbon atoms, bicycloalkyl of 6-12 carbon atoms, aryl of 6-13 carbon atoms, furyl, pyridyl, or aralkyl of 7-20 carbon atoms, comprising reacting cyclic carbonic acid ester with an amine using alkali metal alkoxide or trialkylamine as base, in safety and high yield.