Method for the production of 3-amino-5-(hydroxymethyl) cyclopentane-1,2-diol-derivatives
申请人:Griffiths Gareth-John
公开号:US20070043225A1
公开(公告)日:2007-02-22
A method for the production of acetals and ketals of 3-amino-5-(hydroxymethyl)cyclopentane-1,2-diols of formula (I):
(and/or the enantiomer), where R
1
is H, C
1-6
-alkyl, C
3-8
-cycloalkyl or benzyl and (i) R
2
is methyl and R
3
is ethyl, (ii) R
2
is H and R
3
is C
1-6
-alkyl or phenyl or (iii) R
2
and R
3
together form a group of formula —(CH
2
)
n
— with n=4 to 6, present as free amines or as salts of di- or tri-basic organic acids, starting from 2-acetyl-2-azabicyclo[2.2.1]hept-5-en-3-one of formula (II):
(and/or the enantiomer). The method is equally useful, depending on the starting material, for the production of enantiomerically-pure compounds, or mixtures with arbitrary enantiomeric content.
一种用于制备式(I)的3-氨基-5-(羟甲基)环戊烷-1,2-二醇的缩醛和缩酮的方法:(及/或对映体),其中R1为H,C1-6-烷基,C3-8-环烷基或苄基,(i)R2为甲基,R3为乙基,(ii)R2为H,R3为C1-6-烷基或苯基或(iii)R2和R3共同形成一个式为—(CH2)n—的基团,其中n=4到6,以自由胺或二元或三元有机酸盐的形式存在,从式(II)的2-乙酰基-2-氮杂双环[2.2.1]庚-5-烯-3-酮开始:(及/或对映体)。根据起始材料的不同,该方法同样适用于制备对映纯化合物或任意对映体含量的混合物。