INVESTIGATIONS ON STEROIDS. VI. NEW METHOD OF PREPARING 6(α)-ACETOXYPROGESTERONE 1

Asymmetric Synthesis with 6-tert-Butyl-5

Asymmetric Synthesis with 6-tert-Butyl-5-methoxy-6-methyl-3,6-dihydro-2H-1,4-oxazin-2-one as a New Chiral Glycine Equivalent: Preparation of Enantiomerically Pure α-Tertiary and α-Quaternary α-Amino Acids.

✍ Claus-Juergen Koch; Sona Simonyiova; Joerg Pabel; Annerose Kaertner; Kurt Polbor 📂 Article 📅 2003 🏛 John Wiley and Sons ⚖ 349 KB 👁 1 views

Asymmetric Synthesis with 6-tert-Butyl-5

Asymmetric Synthesis with 6-tert-Butyl-5-methoxy-6-methyl-3,6-dihydro-2H-1,4-oxazin-2-one as a New Chiral Glycine Equivalent: Preparation of Enantiomerically Pure α-Tertiary and α-Quaternary α-Amino Acids

✍ Claus-Jürgen Koch; Soňa Šimonyiová; Jörg Pabel; Annerose Kärtner; Kurt Polborn; 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 351 KB

The Preparation of (1α,3β)-3-Hydroxychol

The Preparation of (1α,3β)-3-Hydroxycholestane-4,6-diene- 1,25-diol Diacetate from a 5,7-Diene Precursor: A New Method for the Synthesis of Heteroannular Dienes

✍ Van Arnum, Susan D.; Carpenter, Barry K.; Parrish, David R.; MacIntrye, Archibal 📂 Article 📅 2004 🏛 American Chemical Society 🌐 English ⚖ 97 KB

Flash vacuum pyrolysis of 2-diazo-8-oxab

Flash vacuum pyrolysis of 2-diazo-8-oxabicyclo[3.2.1]Oct-6-en-3-ones. A new method for the preparation of propadienones.

✍ John C Brahms; William P Dailey 📂 Article 📅 1990 🏛 Elsevier Science 🌐 French ⚖ 230 KB

When diazoketones 3a and 3b are pyrolysed at 43oOC and 10S4 torr, they undergo loss of N2 followed by Wolff rearrangement and loss of furan by retro Diels-Alder reaction to yield the desired propadienones l(a.b). If argon is added to the pyrolysate mixture, these reactive compounds can be trapped un

Approaches to the Total Synthesis of Adr

Approaches to the Total Synthesis of Adrenal Steroids. VI. 2,4b-Dimethyl-7-ethylenedioxy-1,2,3,4,4aα,4b,5,6,7,8,10,10aβ- dodecahydrophenanthrene-4β-ol-1-one and Related Compounds

✍ Lukes, R. M.; Poos, G. I.; Beyler, R. E.; Johns, W. F.; Sarett, L. H. 📂 Article 📅 1953 🏛 American Chemical Society 🌐 English ⚖ 875 KB

Synthesis of new pentacyclic heterocycli

Synthesis of new pentacyclic heterocyclic steroidal analogs, 6-oxabenz[3,4]-d-homoestra- 1,3,5(10),8,14-pentaen-17α-one and 3a,4,5,13-tetrahydro-3H- [2]benzothieno[5,4-d]naphtho- [1,2-b]pyran

✍ B.Ramesh Babu; D.Y. Ramana; S.R. Ramadas 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 412 KB