Copper,(tert-decanoato-O)(2-et

Biotinylation of a Propargylated Cyclic (3′‐5′) Diguanylic Acid and of Its Mono‐6‐Thioated Analog Under “Click” Conditions

?isobutyryl?5??O ?(4,4??dimethoxytrityl)?2??O ?(propargyl)guanosine is converted to its 3??O ?levulinyl ester in a yield of 91%. The reaction of commercial N 2 ?isobutyryl?5??O ?(4,4??dimethoxytrityl)?2??O ?tert ?butyldimethylsilyl?3??O ?[(2?cyanoethyl)?N ,N

放射性核素数据

.350.06050.0　　2、放射性测定单位单位定义换算吸收放射线剂量（拉得rad）100尔格/克（电离辐射传给单位质量物质的能量）0.87rad=1r伦琴（r）使1克空气产生1.6×1012离子对的X或γ-射线的照射剂量r/0.87=1rad居里（Ci）每秒放射性衰变3.7×1010个原子的量1Ci=103mCi=106μCi毫居（mCi）千分之一居里1mCi=10-3Ci=103μCi微居（μCi）百万分之一居里（每分钟衰变2.2×106次）1μCi=10-6Ci=10-3MCi伯克莱尔（Bq

Two‐Step, One‐Pot Synthesis of Inosine, Guanosine, and 2′‐Deoxyguanosine O6‐Ethers via Intermediate O6‐(Benzotriazol‐1‐yl) Derivatives

for the etherification at the O 6 ?position of silyl?protected inosine, guanosine, and 2??deoxyguanosine is described. Typically, a THF solution of the silylated nucleoside is treated with 1H ?benzotriazol?1?yloxy?tris(dimethylamino)phosphonium hexafluorophosphate (BOP