Studies on reductive alkylation: Synthesis of Wieland-Miescher ketone analogues bearing an oxygenated angular substituent
作者:L.N. Mander、R.J. Hamilton
DOI:10.1016/s0040-4039(01)82080-3
日期:1981.1
Wieland-Miescheranalogues 2a and 2b have been prepared in good yield by a sequence utilising reductive alkylation of the dihydro aromatic ester enolate 7d, which functions as a synthetic equivalent of the dioxo ester 5 anion; these analogues are envisaged as intermediates in a projected synthesis of bruceantin.
Function-Oriented Synthesis of Pentacyclic Triterpenoids and Discovery of an <i>ent</i>-Estrane as a Natural Product-Inspired Androgen Receptor Antagonist
作者:Zachary D. Stempel、Hanna S. Radomska、Christopher C. Coss、Glenn C. Micalizio
DOI:10.1021/acs.orglett.4c00697
日期:2024.4.19
and biology, the challenges associated with their asymmetric synthesis contribute to the current reality that medicinal exploration in the area is largely constrained to natural product derivatization. To address this deficiency, a function-orientedsynthesis of pentacyclic triterpenoids was pursued. Overall, we report a divergent synthesis of 26-norgermanicol and 26-norlupeol and we have identified
Rapid Construction of Structurally Diverse Quinolizidines, Indolizidines, and Their Analogues via Ruthenium‐Catalyzed Asymmetric Cascade Hydrogenation/Reductive Amination
作者:Ya Chen、Yan‐Mei He、Shanshan Zhang、Tingting Miao、Qing‐Hua Fan
DOI:10.1002/anie.201812647
日期:2019.3.18
benzo‐fused quinolizidines, indolizidines, and their analogues by ruthenium‐catalyzed asymmetric cascade hydrogenation/reductive amination of quinolinyl‐ and quinoxalinyl‐containing ketones has been developed. This reaction proceeds under mild reaction conditions, affording chiral benzo‐fused aliphatic N‐heterocyclic compounds with structural diversity in good yields (up to 95 %) with excellent diastereoselectivity
Improved methods for the reductive alkylation of methoxybenzoic acids and esters: applications to the synthesis of bicyclic ketones
作者:Robert J. Hamilton、Lewis N. Mander、S.Paul Sethi
DOI:10.1016/s0040-4020(01)90577-0
日期:1986.1
employed to introduce the elements of a butanone or pentanone side-chain as a prelude to adding a fused six-membered ring, thereby completing the preparation of several analogues of the Wieland-Miescher ketone 4a in which the angular substituent was oxygenated.