[NH2:1][C:2]1[C:10]2[CH:9]3[CH2:11][CH2:12][CH2:13][CH2:14][CH:8]3[O:7][C:6]=2[C:5](C(O)=O)=[CH:4][C:3]=1[Cl:18].NC1C2C3CCCCC=3OC=2C(C(O)=O)=CC=1Cl.NC1C2C3C=CC=CC=3OC=2C(C(O)=O)=CC=1Cl>>[NH2:1][C:2]1[C:10]2[C:9]3[CH:11]=[CH:12][CH:13]=[CH:14][C:8]=3[O:7][C:6]=2[CH:5]=[CH:4][C:3]=1[Cl:18]When the procedure of Example 16 is followed however, 1-amino-2-chloro-5a,6,7,8,9,9a-hexahydrodibenzofuran -4-carboxylic acid is replaced by 1-amino2-chloro-6,7,8,9-tetrahydrodibenzofuran-4-carboxylic acid or 1-amino-2-chlorodibenzofuran-4-carboxylic acid then the captioned products are prepared.
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