Six-Step Gram-Scale Synthesis of the Human Immunodeficiency Virus Integrase Inhibitor Dolutegravir Sodium

This is the accepted manuscript version of the work published in its final form as Dietz, Jule-Philipp; Lucas, Tobias; Groß, Jonathan; Seitel, Sebastian; Brauer, Jan; Ferenc, Dorota; Gupton, B. Frank; Opatz, Till. Organic Process Research & Development; Volume: 25; Issue: 11; Pages: 1898-1910; https://doi.org/10.1021/acs.oprd.1c00139. Deposited by shareyourpaper.org and openaccessbutton.org. We've taken reasonable steps to ensure this content doesn't violate copyright. However, if you think it does you can request a takedown by emailing help@openaccessbutton.org.

A concise route to MK-4482 (EIDD-2801) from cytidine.

A two-step route to MK-4482 (EIDD-2801, 1) was developed consisting of an esterification and hydroxamination of cytidine. The selective acylation and direct amination eliminate the need for protecting and activating groups and proceed in overall yield of 75%, a significant advancement over the reported yield of 17%. The step count is reduced from five transformations to two, and expensive uridine is replaced with the more available cytidine.

Glucose as an Eco‐Friendly Reductant in a One‐Pot Synthesis of 2,3‐Dihydroquinazolin‐4(1 H )‐ones

Visible Light Enables Aerobic Iodine Catalyzed Glycosylation

Front Cover: Glucose as an Eco‐Friendly Reductant in a One‐Pot Synthesis of 2,3‐Dihydroquinazolin‐4(1 H )‐ones (Eur. J. Org. Chem. 41/2020)

Six-Step Gram Scale Synthesis of the HIV Integrase Inhibitor Dolutegravir Sodium

A short and practical synthesis for preparing the active pharmaceutical ingredient dolutegravir sodium was investigated. The convergent strategy developed herein starts from 3-(R)-amino-1- butanol and builds up the BC ring system in 76% isolated yield over four steps. Ring A was constructed by a one-pot 1,4-addition to diethyl-(2E/Z)-2-(ethoxymethylidene)-3-oxobutandioate and subsequent MgBr2·OEt2-mediated regioselective cyclization. Amide formation with 2,4- difluorobenzylamine was either performed from the carboxylic acid or through aminolysis of the corresponding ester precursor. Final salt formation afforded dolutegravir sodium in 48–51% isolated yield (HPLC-purity: 99.7–99.9%) over six…

Front Cover: Visible Light Enables Aerobic Iodine Catalyzed Glycosylation (Eur. J. Org. Chem. 28/2019)

Synthesis of 4-amino-5-fluoropyrimidines and 5-amino-4-fluoropyrazoles from a β-fluoroenolate salt

A synthesis of fluorinated pyrimidines under mild conditions from amidine hydrochlorides and the recently described potassium 2-cyano-2-fluoroethenolate was developed. A broad substrate scope was tested and mostly excellent yields were obtained. The synthesis of fluorinated aminopyrazoles from the same fluorinated precursor could be demonstrated but proceeded with lower efficiency.

Total synthesis and biological evaluation of seven new anti-inflammatory oxacyclododecindione-type macrolactones

Through variation of our previously published total synthesis of two highly active anti-inflammatory macrolactones from the oxacyclododecindione family (J. Tauber, M. Rohr, T. Walter, G. Erkel and T. Opatz, Org. Biomol. Chem., 2015, 13, 7813-7821), seven new representatives of this compound class were prepared. Substitution of the 14-hydroxy group in oxacyclododecindione with a methyl substituent provided a readily accessible non-natural analogue which has similar pharmacological properties to the scarcely available natural product. Since the producible amount of substance is therefore no longer restricted by low fermentation yields, extensive in vivo studies become possible for the first t…

CCDC 1998325: Experimental Crystal Structure Determination

Related Article: Carina Weber, Nina Vierengel, Thorsten Walter, Torsten Behrendt, Tobias Lucas, Gerhard Erkel, Till Opatz|2020|Org.Biomol.Chem.|18|5906|doi:10.1039/D0OB00958J

CCDC 1998326: Experimental Crystal Structure Determination

Related Article: Carina Weber, Nina Vierengel, Thorsten Walter, Torsten Behrendt, Tobias Lucas, Gerhard Erkel, Till Opatz|2020|Org.Biomol.Chem.|18|5906|doi:10.1039/D0OB00958J

CCDC 1998324: Experimental Crystal Structure Determination

Related Article: Carina Weber, Nina Vierengel, Thorsten Walter, Torsten Behrendt, Tobias Lucas, Gerhard Erkel, Till Opatz|2020|Org.Biomol.Chem.|18|5906|doi:10.1039/D0OB00958J