Results 111 to 120 of about 138,145 (310)

Stereochemical Dissection of the Strobilurin PKS Reveals the Complex Biosynthetic Logic of Iterative EZE Triene Construction

open access: yesAngewandte Chemie International Edition, EarlyView.
The strobilurin iterative PKS assembles a remarkable EZE triene by varying its stereoselectivity during synthesis. Stereoselective 2R‐methylation of the triketide intermediate by the C‐terminal C‐methyltransferase domain induces the KR and DH domains to invert their native stereoselectivities and produce a Z‐configured intermediate.
Maurice Hauser   +5 more
wiley   +1 more source

An easy α-glycosylation methodology for the synthesis and stereochemistry of mycoplasma α-glycolipid antigens

open access: yesBeilstein Journal of Organic Chemistry, 2012
Mycoplasma fermentans possesses unique α-glycolipid antigens (GGPL-I and GGPL-III) at the cytoplasm membrane, which carry a phosphocholine group at the sugar primary (6-OH) position.
Yoshihiro Nishida   +6 more
doaj   +1 more source

Stereochemical outcomes of C–F activation reactions of benzyl fluoride

open access: yesBeilstein Journal of Organic Chemistry, 2018
In recent years, the highly polar C–F bond has been utilised in activation chemistry despite its low reactivity to traditional nucleophiles, when compared to other C–X halogen bonds.
Neil S. Keddie   +4 more
doaj   +1 more source

Five-membered ring annelation in [2.2]paracyclophanes by aldol condensation

open access: yesBeilstein Journal of Organic Chemistry, 2014
Under basic conditions 4,5,12,13-tetraacetyl[2.2]paracyclophane (9) cyclizes by a double aldol condensation to provide the two aldols 12 and 15 in a 3:7 ratio.
Henning Hopf   +2 more
doaj   +1 more source

Stereochemical Research on Cembranes Diterpenoid Sinulariol Z Based on Residual Dipolar Couplings

open access: yesChinese Journal of Magnetic Resonance
Research on the stereochemistry of natural products, especially that of flexible macrocyclic molecules, has always been a huge challenge. Cembranes diterpenoids are a typical class of flexible macrocyclic molecules, whose configurations are often ...
SHI Xing   +3 more
doaj   +1 more source

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