甲醇 、
2,3-Dihydro-2,2-dimethyl-3-oxazolcarbonsaeure-methylester 、 Phenylglyoxylsaeure-((1R,2S,5R)-5-methyl-2-(1-methyl-1-phenylethyl)-1-cyclohexyl)ester 在
对甲苯磺酸 作用下,
生成 2-Hydroxy-2-<5-methoxy-3-(methoxycarbonyl)-2,2-dimethyl-4-oxazolidinyl>-2-phenylessigsaeure-<(1R,2S,5R)-5-methyl-2-(1-methyl-1-phenylethyl)cyclohexyl>ester 、
2-Hydroxy-2-<5-methoxy-3-(methoxycarbonyl)-2,2-dimethyl-4-oxazolidinyl>-2-phenylessigsaeure-<(1R,2S,5R)-5-methyl-2-(1-methyl-1-phenylethyl)cyclohexyl>ester 、 2-Hydroxy-2-<4-methoxy-3-(methoxycarbonyl)-2,2-dimethyl-5-oxazolidinyl>-2-phenylessigsaeure-<(1R,2S,5R)-5-methyl-2-(1-methyl-1-phenylethyl)cyclohexyl>ester 、
2-Hydroxy-2-<4-methoxy-3-(methoxycarbonyl)-2,2-dimethyl-5-oxazolidinyl>-2-phenylessigsaeure-<(1R,2S,5R)-5-methyl-2-(1-methyl-1-phenylethyl)cyclohexyl>ester