Synthesis and in Vitro Evaluation of 5-closo- and 5-nido-Orthocarboranyluridines as Boron Carriers

Sugar-part modified closo-carboranyluridines, 5-(o-carboran-1-yl)-2′,3′-dideoxy-3′-thiauridine 5 and 5-(o-carboran-1-yl)-2′,3′-dideoxy-2′α-phenylthiouridine 6, were synthesized. These newly synthesized closo-carboranyluridines, 5 and 6, and previously synthesized 5-(o-carboran-1-yl)uridine 1 were co...

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Published inBulletin of the Chemical Society of Japan Vol. 70; no. 12; pp. 3103 - 3110
Main Authors Imamura, Ken-ichiro, Yamamoto, Yoshinori
Format Journal Article
LanguageEnglish
Published TOKYO The Chemical Society of Japan 01.12.1997
Chemical Soc Japan
Chemical Society of Japan
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Abstract Sugar-part modified closo-carboranyluridines, 5-(o-carboran-1-yl)-2′,3′-dideoxy-3′-thiauridine 5 and 5-(o-carboran-1-yl)-2′,3′-dideoxy-2′α-phenylthiouridine 6, were synthesized. These newly synthesized closo-carboranyluridines, 5 and 6, and previously synthesized 5-(o-carboran-1-yl)uridine 1 were converted to the corresponding nido-carboranyluridines 18, 19, and 17, respectively. Water-solubility of nido-type 17 was about 100 times higher than that of its closo-counterpart 1. Water-solubilities of sugar modified nido-types 18 and 19 were about 1000 times higher than those of their closo-counterparts 5 and 6 . Cytotoxicities of the nido-types (17 and 19) were about 10 times lower than those of the corresponding closo-counterparts (1 and 6, respectively). Cellular uptake of the nido-types (17 and 19) was in the level similar to that of the closo-counterparts (1 and 6, respectively), although it is often believed that cellular uptake of hydrophilic carboranes (nido-forms) is much lower than that of lipophilic closo-carboranes.
AbstractList Sugar-part modified closo-carboranyluridines, 5-(o-carboran-1-yl)-2',3'-dideoxy-3'-thiauridine 5 and 5-(o-carboran-1-yl)-2',3'-dideoxy-2'α-phenylthiouridine 6, were synthesized. These newly synthesized closo-carboranyluridines, 5 and 6, and previously synthesized 5-(o-carboran-1-yl)uridine 1 were converted to the corresponding nido-carboranyluridines 18, 19, and 17, respectively. Water-solubility of nido-type 17 was about 100 times higher than that of its closo-counterpart 1. Water-solubilities of sugar modified nido-types 18 and 19 were about 1000 times higher than those of their closo-counterparts 5 and 6 . Cytotoxicities of the nido-types (17 and 19) were about 10 times lower than those of the corresponding closo-counterparts (1 and 6, respectively). Cellular uptake of the nido-types (17 and 19) was in the level similar to that of the closo-counterparts (1 and 6, respectively), although it is often believed that cellular uptake of hydrophilic carboranes (nido-forms) is much lower than that of lipophilic closo-carboranes.
Sugar-part modified closo-carboranyluridines, 5-(o-carboran-1-yl)-2',3'-dideoxy-3'-thiauridine 5 and 5-(o-carboran-1-yl)-2',3'-dideoxy-2'alpha-phenylthiouridine 6, were synthesized. These newly synthesized closo-carboranyluridines, 5 and 6, and previously synthesized 5-(o-carboran-1-yl)uridine 1 were converted to the corresponding nido-carboranyluridines 18, 19, and 17, respectively. Water-solubility of nide-type 17 was about 100 times higher than that of its close-counterpart 1. Water-solubilities of sugar modified nido-types 18 and 19 were about 1000 times higher than those of their closo-counterparts 5 and 6. Cytotoxicities of the nido-types (17 and 19) were about 10 times lower than those of the corresponding close-counterparts (1 and 6, respectively). Cellular uptake of the nido-types (17 and 19) was in the level similar to that of the close-counterparts (1 and 6, respectively), although it is often believed that cellular uptake of hydrophilic carboranes (nido-forms) is much lower than that of lipophilic closo-carboranes.
Abstract Sugar-part modified closo-carboranyluridines, 5-(o-carboran-1-yl)-2′,3′-dideoxy-3′-thiauridine 5 and 5-(o-carboran-1-yl)-2′,3′-dideoxy-2′α-phenylthiouridine 6, were synthesized. These newly synthesized closo-carboranyluridines, 5 and 6, and previously synthesized 5-(o-carboran-1-yl)uridine 1 were converted to the corresponding nido-carboranyluridines 18, 19, and 17, respectively. Water-solubility of nido-type 17 was about 100 times higher than that of its closo-counterpart 1. Water-solubilities of sugar modified nido-types 18 and 19 were about 1000 times higher than those of their closo-counterparts 5 and 6 . Cytotoxicities of the nido-types (17 and 19) were about 10 times lower than those of the corresponding closo-counterparts (1 and 6, respectively). Cellular uptake of the nido-types (17 and 19) was in the level similar to that of the closo-counterparts (1 and 6, respectively), although it is often believed that cellular uptake of hydrophilic carboranes (nido-forms) is much lower than that of lipophilic closo-carboranes.
Author Imamura, Ken-ichiro
Yamamoto, Yoshinori
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Issue 12
Keywords CANCER-CELLS
ACID RELATED-COMPOUNDS
P-BORONOPHENYLALANINE
ANALOGS
INVITRO
NEUTRON-CAPTURE THERAPY
BIOLOGICAL PROPERTIES
STEREOCHEMISTRY
GLYCOSYLATION
NUCLEOSIDE BASES
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SSID ssj0008549
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Snippet Sugar-part modified closo-carboranyluridines, 5-(o-carboran-1-yl)-2′,3′-dideoxy-3′-thiauridine 5 and 5-(o-carboran-1-yl)-2′,3′-dideoxy-2′α-phenylthiouridine 6,...
Sugar-part modified closo-carboranyluridines, 5-(o-carboran-1-yl)-2',3'-dideoxy-3'-thiauridine 5 and...
Abstract Sugar-part modified closo-carboranyluridines, 5-(o-carboran-1-yl)-2′,3′-dideoxy-3′-thiauridine 5 and...
Sugar-part modified closo-carboranyluridines, 5-(o-carboran-1-yl)-2',3'-dideoxy-3'-thiauridine 5 and 5-(o-carboran-1-yl)-2',3'-dideoxy-2'α-phenylthiouridine 6,...
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SubjectTerms Chemistry
Chemistry, Multidisciplinary
Physical Sciences
Science & Technology
Title Synthesis and in Vitro Evaluation of 5-closo- and 5-nido-Orthocarboranyluridines as Boron Carriers
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