摘要:
There is provided a compound of the formula[I]: wherein R represents a hydrogen atom or a protective group for a hydroxyl group; and A represents a hydrogen atom, a halogen atom or a group of the formula A1: Q represents Q3: when A represents a halogen atom or a protective group for a hydroyl group, A represents Q4: wherein R1 and R2 represent a hydrogen atom or a protective group for a hydroxyl group; and when A represents a hydrogen atom, Q is Q2:
摘要:
There are disclosed a disulfone compound of formula (1): wherein Ar denotes an aryl group that may have a substituent, R1 denotes a hydrogen atom or a protective group of a hydroxyl group and the wavy line means that the disulfone compound is an E or Z geometrical isomer or a mixture thereof, a method for producing the same, intermediate compounds therefore and a process for producing retinol through the disulfone compound.
摘要:
There are disclosed an alcohol derivative of formula (1): wherein Ar is an optionally substituted aryl group and R is a straight or branched C1-C3 lower alkyl group, and the wavy line depicted by indicates a single bond and stereochemistry relating to a double bond bound therewith is E or Z or a mixture thereof, and a process for producing the same and a process for producing Vitamin A aldehyde using the same.
摘要:
The present invention relates to a process for producing an allyl sulfone derivative represented by the formula (3): wherein Ar is an optionally substituted aryl group, and the corrugated line means either one of E/Z geometrical isomers, or a mixture thereof, which is an intermediate for producing vitamin A, which process is characterized by reacting an aryl sulfinic acid or a salt thereof represented by the formula (2): ArSO2M (2) wherein Ar is as defined above, and M is hydrogen atom, sodium atom or potassium atom, with an allyl halide derivative represented by the formula (1): wherein X is a halogen atom, and Ar and the corrugated line are as defined above.
摘要:
There are disclosed sulfone aldehyde derivatives of the Formula (1): wherein Ar is an optionally substituted aryl group, a process for producing retinal by using the same, and an intermediate for producing the sulfone aldehyde derivative.
摘要:
There is provided a ketosulfone derivative represented by the formula (I): wherein Ar represents an aryl group which may be substituted, and R1′ and R2′ represent a hydrogen atom or a protective group of a hydroxyl group and processes for producing the same.
摘要:
A tetraene derivative of the formula (1): ##STR1## wherein Ar represents an aryl group which may be optionally substituted with at least one substituent, and R.sup.1 and R.sup.2 are identical or different and represent a hydrogen atom, a lower alkyl group or a protective group of a hydroxyl group; synthesis methods therefor and synthesis methods using the same.
摘要:
There is disclosed a dihalo-compound of formula (1): wherein X1 and X2 represent different halogen atoms, R represents a hydrogen atom or a protective group for a hydroxyl group, and a process for producing vitamin A derivative via a sulfone derivative of formula (5): wherein Ar represents an optionally substituted aryl group, and R represents the same as defined above.
摘要:
There are disclosed a disulfone compound of formula (1): wherein Ar denotes an aryl group that may have a substituent, R1 denotes a hydrogen atom or a protective group of a hydroxyl group and the wavy line means that the disulfone compound is an E or Z geometrical isomer or a mixture thereof, a method for producing the same, intermediate compounds therefore and a process for producing retinol through the disulfone compound.
摘要:
There are provided a dihalogen derivative represented by formula (2): wherein X represents a halogen atom and R2 represents a protective group for a hydroxyl group; a process for producing the same; and a process for producing vitamin A by use of said dihalogen derivative.