Results 131 to 140 of about 138,145 (310)

Synthesis and stereochemistry of hydroporphyrins [PDF]

, 1978
Dolphin, D., Scheer, Hugo
core   +1 more source

Total Synthesis and Complete Stereochemical Assignment of Amphirionin‐5, a Potent Natural Osteoblasts Proliferator

ChemistryEurope, EarlyView.
The convergent total synthesis of a candidate diastereomer of amphirionin‐5 was accomplished in 22 steps via the coupling of the C1‐C16 enone segment and the C17‐C28 aldehyde segment using Stetter reaction. The overall stereochemistry of amphirionin‐5 was fully assigned, based on the comparison of spectroscopic and chiroptical data between the ...
Yusuke Ogura, Kenji Nemoto, Tadafumi Fujita, Yuta Inori, Daisuke Abe, Hironori Okamura, Hirosato Takikawa, Shigefumi Kuwahara   +7 more
wiley   +1 more source

Stereochemistry of a-Kessylalcohol and Kessylglycol

, 1965
Shô Itô, Hiroshi Hikino, Mitsuaki Kodama, Yasuko Hikino, Yasuyoshi Takeshita   +4 more
openalex   +2 more sources

Introducing the Cis‐2,3‐Bis(trifluoromethyl)cyclopropyl Chemotype: Late‐Stage Installation and Stereoelectronic Properties

ChemistryEurope, EarlyView.
The cis‐2,3‐bis(trifluoromethyl)cyclopropyl chemotype is introduced. The steric demand of this motif is intermediate between that of the heptafluoroisopropyl and prefluorotertbutyl groups; yet, it induces significantly less lipophilicity than these due to its facial polarity.
Daniel Gaviña, Zeyu Feng, David Herrero, Martin Simon, Christopher Golz, Manuel Alcarazo   +5 more
wiley   +1 more source

Cyclopropenes in Photochemical Reactions

Chemistry – A European Journal, EarlyView.
The photochemical side of cyclopropenes. Cyclopropenes are valuable synthetic tools in organic chemistry. In particular, this review focuses on the photochemistry of cyclopropenes. The reactivity of cyclopropenes excited by irradiation is discussed showing their unique potential for organic synthesis.
David Suárez‐García, Darío Coto, Rubén Vicente   +2 more
wiley   +1 more source

STEROID COMPOUNDS. PART VII . SOME OBSERVATIONS ON THE COPE-KNOEVENAGEL CONDENSATION OF ETHYL CYANOACETATE WITH ETHYL 2-METHYL-2β-CARBETHOXYETHYlcycloPENTA- NONE AND THE STEREOCHEMISTRY OF THE REDUCTION PRODUCT

, 1956
Naba K. Chaudhuri, P. C. MUKHARJI
openalex   +1 more source

The Stereochemistry of Osmylation of 2- and 17-Methylene-5α-Androstanes [PDF]

, 2003
Khaled Al‐Fouti, James R. Hanson
openalex   +1 more source

The Formation of Covalent Linkages in Lignocellulosic Biomass via the Oxocarbenium Intermediate

ChemPhysChem, EarlyView.
Density functional theory models show that the hydrated and acidic hemicellulose matrix in lignocellulosic biomass can generate oxocarbenium ions. These reactive intermediates can participate in the stable formation of glycosidic lignin‐carbohydrate covalent linkages, promoting recalcitrance in plant biomass.
Eduardo Romero‐Montalvo, Samir H. Mushrif   +1 more
wiley   +1 more source

Stereochemistry of Decahydroisoquinolines and Related Compounds. III. Syntheses of cis-2-Methyl-decahydro-7-isoquinolinols.

, 1963
Masao Okamoto, Masayo Yamada
openalex   +2 more sources

Xylose Acetals ‐ a New Class of Sustainable Solvents and Their Application in Enzymatic Polycondensation

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
Novel organic solvents with an unmodified carbohydrate core were synthesised both from D‐xylose and directly from biomass and were successfully used as reaction media for lipase biocatalysts to synthesise aliphatic and aromatic polyesters. Abstract The use of organic solvents in academic research and industry applications is facing increasing ...
Anastasia O. Komarova, Cicely M. Warne, Hugo Pétremand, Laura König‐Mattern, Johannes Stöckelmaier, Chris Oostenbrink, Georg M. Guebitz, Jeremy Luterbacher, Alessandro Pellis   +8 more
wiley   +1 more source