as the acetonide. Then, ozonolysis of the double bond, followed by reduction led to a cis-diol. Then successive deprotections of the three other methanol groups gave the cis,cis,cis,cis-1,2,3,4,5-pentakis(hydroxymethyl)cyclopentane.
清一色顺pentamethanolcyclopentane已在六个步骤通过
马来酸酐的第尔斯-阿尔德缩合(苄氧基甲基)环戊-2,4-二烯,
还原酸酐到被保护为
丙酮化物的二醇获得。然后,双键的
臭氧分解,接着还原导致顺式
-二醇。然后其他三个
甲醇基团的去保护连续得到顺式,顺式,顺式,顺-1,2,3,4,5-五(羟甲基)
环戊烷。