The present invention provides a method of preparing a compound of formula 6
comprising:
(a) reacting a compound of formula 1
with a compound of formula 2
to form a compound of formula 3
wherein X of formula 2 is Cl or OH;
(b) treating the compound formula 3 with Lawesson's reagent to form a compound of formula 4
(c) reacting a compound of formula 4 with potassium ferricyanide to produce a compound of formula 5
and
(d) performing catalytic reduction of nitro group of the compound of formula 5 with palladium on charcoal to generate the compound of formula 6,
wherein R
1
of formulae 1-6 is H, C
1-10
alkyl, C
1-10
alkoxy or C
1-10
haloalkyl, and R
2
of formulae 1-6 is H or C
1-10
alkyl.
The present invention also provides a photodynamic therapy to a patient having at least one tumor comprising the steps of: administering a compound of formula 6 (wherein R
1
and R
2
are defined as the above) in a pharmaceutically acceptable carrier to the patient; waiting for a sufficient time to allow the administered compound to be taken up by a target tissue having the at least one tumor; and irradiating a region of the patient containing the target tissue; wherein growth of the tumor is inhibited.
本发明提供了一种制备6式化合物的方法,包括:(a) 将1式化合物与2式化合物反应以形成3式化合物,其中2式化合物的X为Cl或OH;(b) 用Lawesson试剂处理3式化合物以形成4式化合物;(c) 将4式化合物与
氰化亚
铁钾反应以生成5式化合物;(d) 用
活性炭上的
钯进行5式化合物的硝基团的催化还原,生成6式化合物,其中1-6式中的R1为H、C1-10烷基、C1-10烷
氧基或C1-10卤代烷基,1-6式中的R2为H或C1-10烷基。本发明还提供了一种对患有至少一种肿瘤的患者进行光动力疗法的方法,包括以下步骤:向患者投药物学可接受的载体中的6式化合物(其中R1和R2如上所定义);等待足够的时间以使给药的化合物被目标组织(至少一种肿瘤)吸收;照射患者身体含有目标组织的区域;从而抑制肿瘤的生长。