Total syntheses of optically active 19-nor steroids. (+)-Estr-4-ene-3,17-dione and (+)-13.beta.-ethylgon-4-ene-3,17-dione

Robert A. Micheli, Zoltan G. Hojos, Noal Cohen, +5

The Journal of Organic Chemistry

BiosynthesisBioorganic ChemistryEngineeringBiochemistryEnantioselective Synthesis +11

Synthetic studies on (2R,4'R,8'R)-.alpha.-tocopherol. Facile syntheses of optically active, saturated, acyclic isoprenoids via stereospecific [3,3] sigmatropic rearrangements

Ka-Kong Chan, Noal Cohen, James P. De Noble, +2

The Journal of Organic Chemistry

EngineeringBiochemistryDonut IconSynthetic StudiesNatural Sciences +11

Synthetic studies on (2R,4'R,8'R)-.alpha.-tocopherol. An approach utilizing side chain synthons of microbiological origin

Noal Cohen, Wayne F. Eichel, Rocco J. Lopresti, +2

The Journal of Organic Chemistry

BiosynthesisBiotransformationBiochemistryDonut IconSynthetic Studies +10

Enantiospecific syntheses of leukotrienes C4, D4, and E4, and [14,15-3H2]leukotriene E4 dimethyl ester

Noal Cohen, Bruce L. Banner, Rocco J. Lopresti, +5

Journal of the American Chemical Society

EngineeringAltmetric Attention ScoreOrganic ChemistryChemistryChemical Derivative +15

Asymmetric induction in 19-norsteroid total synthesis

Noal Cohen

Accounts of Chemical Research

AltmetricsBiosynthesisEngineeringEnantioselective SynthesisDonut Icon +13

Total Synthesis of All Eight Stereoisomers of α‐Tocopheryl Acetate. Determination of their diastereoisomeric and enantiomeric purity by gas chromatography

Noal Cohen, Clifford G. Scott, Christian Neukom, +3

Helvetica Chimica Acta

Enantioselective SynthesisBioorganic ChemistryBiochemistryAbstract All EightNatural Sciences +13

A novel total synthesis of (2R,4'R,8'R)-.alpha.-tocopherol (vitamin E). Construction of chiral chromans from an optically active, nonaromatic precursor

Noal Cohen, Rocco J. Lopresti, G. Saucy

Journal of the American Chemical Society

Vitamin EChiral ChromansBiochemistryNatural SciencesAltmetric Attention Score +10

Studies on the total synthesis of (2R, 4'R, 8'R)-.alpha.-tocopherol (vitamin E). Stereospecific cyclizations leading to optically active chromans

Noal Cohen, Rocco J. Lopresti, Christian Neukom

The Journal of Organic Chemistry

Vitamin EMolecular SciencesEngineeringHeterocyclicBiochemistry +13

Novel total syntheses of (+)-estrone 3-methyl ether, (+)-13.beta.-ethyl-3-methoxygona-1,3,5(10)-trien-17-one, and (+)-equilenin 3-methyl ether

Noal Cohen, Bruce L. Banner, Wayne F. Eichel, +5

The Journal of Organic Chemistry

Engineering3-Methyl EtherAltmetric Attention ScoreOrganic ChemistryNovel Total Syntheses +9

Asymmetric reductions of .alpha.,.beta.-acetylenic ketones and acetophenone using lithium aluminum hydride complexed with optically active 1,3-amino alcohols

Noal Cohen, Rocco J. Lopresti, Christian Neukom, +1

The Journal of Organic Chemistry

Chemical EngineeringChemical MeasurementEngineeringChemical AnalysisActive 1,3-Amino Alcohols +11