Tandem Use of Cobalt-Mediated Reactions to Synthesize (+)-Epoxydictymene, a Diterpene Containing a <i>Trans</i>-Fused 5−5 Ring System
作者:Timothy F. Jamison、Soroosh Shambayati、William E. Crowe、Stuart L. Schreiber
DOI:10.1021/ja970022u
日期:1997.5.1
(+)-epoxydictymene has been synthesized in 20 steps using the asymmetry of (R)-pulegone and several substrate-controlled diastereoselective reactions to prepare the natural product in its natural configuration. Three of the four rings were assembled with two consecutive intramolecular reactions involving dicobalt hexacarbonyl complexes of alkynes: a Lewisacid-promoted Nicholas reaction and a Pauson−Khand reaction
Lessons in Strain and Stability: Enantioselective Synthesis of (+)‐[5]‐Ladderanoic Acid
作者:Erin N. Hancock、Erin L. Kuker、Dean J. Tantillo、M. Kevin Brown
DOI:10.1002/anie.201910901
日期:2020.1.2
The synthesis of structurally complex and highly strained natural products provides unique challenges and unexpected opportunities for the development of new reactions and strategies. Herein, the synthesis of (+)-[5]-ladderanoic acid is reported. En route to the target, unusual and unexpected strain release driven transformations were uncovered. This occurrence required a drastic revision of the synthetic
3'-or 2'-hydroxymethyl substituted nucleoside derivatives for treatment of hepatites virus infections
申请人:——
公开号:US20020055483A1
公开(公告)日:2002-05-09
The present invention relates to a composition for and a method of treating hepatitis B virus (HBV) infection, hepatitis C virus (HCV) infection, hepatitis D virus (HDV) infection or a proliferative disorder in a patient using an effective amount of a compound selected from the group consisting of formulas [I]- [IV] below and mixtures of two or more thereof:
1
wherein the substituents are as defined herein. Pharmaceutical compositions comprising these compounds in combination with other HBV, HCV, or HDV agents is also disclosed.
3'-or 2'-hydroxymethyl substituted nucleoside derivatives for treatment of viral infections
申请人:Pharmasset, Inc.
公开号:EP1964569A2
公开(公告)日:2008-09-03
The present invention relates to a composition for and a method of treating hepatitis B virus (HBV) infection, hepatitis C virus (HCV) infection, hepatitis D virus (HDV) infection or a proliferative disorder in a patient using an effective amount of a compound selected from the group consisting of formulas (I)-(IV) below and mixtures of two or more thereof, wherein the substituents are as defined herein. Pharmaceutical compositions comprising these compounds in combination with other HBV, HCV, or HDV agents is also disclosed.