A 3-alkenylcephem compound of the formula (1)
wherein R
1
is benzyl or phenoxymethyl, R
2
, R
3
and R
4
are alike or different and are each a hydrogen atom, C
1-10
alkyl, C
4-8
cycloalkyl or aryl C
1-3
alkyl substituted or unsubstituted with C
1-4
alkyl, R
2
and R
3
, when taken together, form a group —(CH
2
)
l
X
m
(CH
2
)
n
— substituted or unsubstituted with C
1-4
alkyl at an optional position, X is an oxygen atom or group —N(R
5
)—, l is 0 to 3, m is 0 or 1, n is an integer of 2 to 4, R
5
is a hydrogen atom or C
1-4
alkyl.
化合物的名称为3-烯丙基
头孢菌素,其
化学式为(1),其中R1为苄基或苯氧甲基,R2,R3和R4相同或不同,分别为氢原子,C1-10烷基,C4-8环烷基或芳基C1-3烷基,该芳基可以被C1-4烷基取代或未取代,当R2和R3组合在一起时,形成一个基团-(
CH2)lXm( )n-,在可选位置上用C1-4烷基取代或未取代,X为氧原子或基团-N(R5)-,l为0至3,m为0或1,n为2至4的整数,R5为氢原子或C1-4烷基。