Elongated and multiple spacers in activatible produgs
申请人:——
公开号:US20040121940A1
公开(公告)日:2004-06-24
This invention is directed to prodrugs that can be activated at the preferred site of action in order to selectively deliver the corresponding therapeutic parent drugs to target cells or to the target site. This invention will therefore primarily but not exclusively relate to tumor cells as target cells. More specifically the prodrugs are compounds of the formula V—(W)k-(X)l-A-Z, wherein: V is a specifier; (W)k-(X)l-A is an elongated self-elimination spacer system; W and X are each a l,(4+2n) electronic cascade spacer, being the same or different; A is either a spacer group of formula (Y) m wherein: Y is a l,(4+2n) electronic cascade spacer, or a group of formula U being a cyclisation elimination spacer; Z is a therapeutic drug; k, l and m are integers from 0 (included) to 5 (included); n is an integer of 0 (included) to 10 (included), with the provisos that:—when A is (Y)m: k+l+m
1, and if k+l+m=1;—when A is U: k+l
1.
Dipeptide werden hergestellt durch Umsetzung von N-geschützten α-Aminocarbonsäureestern als Carboxylkomponente mit einer α-Aminocarbonsäure mit underivatisierter α-Amino- und Carboxylgruppe als Aminokomponente in Gegenwart einer Crystein-Protease. Die Umsetzung erfolgt bei einem pH von mindestens 7 und bei einer Temperatur im Bereich zwischen Raumtemperatur und 60 °C.
二肽是通过将 N 保护的 α-氨基羧酸酯(作为羧基成分)与具有未充分活化的 α-氨基和羧基的 α-氨基羧酸(作为氨基成分)在冰晶蛋白酶的作用下进行反应而制成的。反应在 pH 值至少为 7、温度介于室温和 60 °C 之间的条件下进行。
Thermostable peptidase
申请人:California Institute of Technology, a California corporation
公开号:US20020106779A1
公开(公告)日:2002-08-08
Thermostable peptidase enzyme derived from archaeon from the genus Pyrococcus is disclosed. The enzyme is produced from native or recombinant host cells and can be utilized in the biotechnology industry as a useful enzyme in sequencing reactions.