𝔖 Bobbio Scriptorium
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Synthesis of steroids and related compounds

✍ Scribed by I. N. Nazarov; S. I. Zavyalov

Book ID
112491114
Publisher
Springer
Year
1958
Tongue
English
Weight
346 KB
Volume
6
Category
Article
ISSN
1573-9171

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📜 SIMILAR VOLUMES

Stereoselective Synthesis of Steroids an
Stereoselective Synthesis of Steroids and Related Compounds, V. Synthesis of (±)-Chokol A by a Tandem Michael-Addition/Dieckmann Cyclization
✍ Groth, Ulrich ;Halfbrodt, Wolfgang ;Köhler, Thomas ;Kreye, Paul 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 736 KB

## Abstract A total synthesis of (±)‐chokol A (__rac__‐12) was accomplished in five steps by starting from the α,β‐unsaturated ester (__E__)‐2 in an overall yield of 24%. The key step of this synthesis is the tandem conjugate addition/Dieckmann cyclization of the cuprate derived from vinyl bromide

Stereoselective Synthesis of Steroids an
Stereoselective Synthesis of Steroids and Related Compounds, III. Synthesis of Enantiomerically Pure Hexahydro-1H-indenes and Substituted Cyclopentanes as Intermediates for the Synthesis of Steroids
✍ Groth, Ulrich ;Taapken, Thomas 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 279 KB

## Abstract The indene derivative 7 and the 1,2,2,3‐tetrasubstituted cyclopentane derivative 8 have been synthesized in three steps starting from the Hajos‐Wiechert ketone 1. magnified image

Stereoselective Synthesis of Steroids an
Stereoselective Synthesis of Steroids and Related Compounds, IV. Addition of Cerium Reagents Derived from (Trimethylsilyl)propargyl Bromide to Aldehydes
✍ Eckenberg, Peter ;Groth, Ulrich ;Köhler, Thomas 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 606 KB

## Abstract The addition of (trimethylsilyl)propargylmagnesium bromide (9) to aldehydes afforded predominantly the allenylic alcohols __rac__‐10. The regioselectivity of this addition changes dramatically when organocerium reagents were used for the addition. In this case nearly exclusive formation

Thioalkylation of Enolates, III. Stereos
Thioalkylation of Enolates, III. Stereoselective Synthesis of Steroids and Related Compounds, II α-Thioalkylation of Zinc Dienolates to 4-Substituted 1-tert-Butoxy-7a-methyl-hexahydroinden-5-ones
✍ Groth, Ulrich ;Köhler, Thomas ;Taapken, Thomas 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 484 KB

## Abstract α‐Alkylation of the α,β‐unsaturated ketone 1 at C‐4 has been achieved by thioalkylation of the corresponding zinc dienolate with α‐chlorosulfides of type 2. The desulfurization of the β‐(phenylthio) ketones 4 leads directly to the 4‐substituted hexahydroinden‐5‐ones 5. magnified image