106 results on '"PARYZEK, Z."'
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2. ChemInform Abstract: Steroidal Cyclobutanones. Part 2. Diastereofacial Selection in the Cycloaddition of Dichloroketene and 3β-Acetoxy-20a-homopregna-5, 20-diene. Crystal Structure of the Cycloadduct, (20S)-3β-Acetoxy- 20,24-cyclo-22,22-dichlorochol-5-en-
3. ChemInform Abstract: Tetracyclic Triterpenes. Part 13. A New Synthesis of 4β-Demethyl- 24,25-dihydrolanosterol.
4. ChemInform Abstract: Steroidal Cyclobutanones. Part 3. The Synthesis and Stereochemistry of 3-Spiro-5α-cholestane Derivatives with Three-, Four-, and Five- Membered Carbon Rings. A Double Cine Substitution in Spiro-α,. alpha.-dichlorocyclobutan-3-ones.
5. ChemInform Abstract: Tetracyclic Triterpenes. Part 15. Ring Expansion of Steroidal Acyloins: 3-Acetyl-3-hydroxy-14α-methyl-4-nor-5α- and -5β- cholest-8-ene.
6. ChemInform Abstract: Steroidal Cyclobutanones. Part 5. The Baeyer-Villiger Rearrangement of α-Substituted β-Spirocyclobutanones.
7. ChemInform Abstract: Synthetic Pathways to 2,2-Dimethyl-6-oxo-1-cyclohexaneacetic Acid, a Useful Isoprenoid Building Block.
8. ChemInform Abstract: Unusual Ozonolysis of Cholesteryl and Androst-5-en-3β-yl Acetates in the Presence of Primary Amines. Formation of A-Nor-3(5→6α)abeo-6β(H)-5-oxo-steroids, Confirmed by X-Ray Analysis.
9. A Convenient Procedure for the Preparation of Oxime Chloroformates.
10. ChemInform Abstract: Ozonolysis of Cholesterol and Other Δ5‐Steroids in the Presence of Alcohols: A Revised Mechanism and Hydroperoxide Structure of the Solvent‐Participated Product, Confirmed by X‐Ray Analysis.
11. 1H and13C NMR Data for Spiro Steroids, Derivatives of 5α-Cholestane
12. ChemInform Abstract: Tetracyclic Triterpenes. Part 16. Synthesis of 31‐Norcucurbitane and Fusidane Derivatives in the Skeletal Rearrangements of 9,11‐Epoxy‐4. beta.‐demethyl‐5α‐lanostanes.
13. ChemInform Abstract: Oxidation of Homoallylic Steroidal Alcohols with Pyridinium Chlorochromate. The Synthesis of Steroidal 4‐En‐3,6‐diones.
14. ChemInform Abstract: Oxidation of 3β‐Acetoxy‐5α‐lanost‐8‐ene with Chromyl Chloride. The Preparation of 5α,8β‐Lanost‐9(11)‐en‐7‐one Derivatives.
15. Oxidation of Homoallylic Steroidal Alcohols with Pyridinium Chlorochromate. The Synthesis of Steroidal 4-En-3,6-Diones
16. ChemInform Abstract: The Preparation of δ2‐Steroids. An Improved Procedure.
17. OXIDATION OF 3β-ACETOXY-5α-LANOST-8-ENE WITH CHROMYL CHLORIDE. THE PREPARATION OF 5α,8β-LANOST-9(11)-EN-7-ONE DERIVATIVES
18. THE PREPARATION OF Δ2STEROIDS. AN IMPROVED PROCEDURE
19. ChemInform Abstract: Steroidal Cyclobutanones. Part 4. Heterocyclic Spiroannulation of 5. alpha.‐Cholestan‐3‐one. Stereospecific Beckmann Rearrangement of Steroidal 3‐Spirocyclobutanone Oximes.
20. ChemInform Abstract: Facile Elimination of Ethanethiol in the Reaction of α‐Hydroxy β‐Bis‐(ethylthio) Acetals with Copper(I) Chloride in Dimethylformamide.
21. ChemInform Abstract: Steroidal Cyclobutanones. Part 1. Synthesis and Stereochemistry of Steroidal Spirocyclobutanones.
22. ChemInform Abstract: Reaction of Ozone with Steroidal Allylic Alcohols: Evidence for Intramolecular Interception of the “Criegee Carbonyl/Carbonyl Oxide Intermediate”.
23. ChemInform Abstract: The Reaction of Cholesterol with Ozone and Alcohols: A Revised Mechanism and Structure of the Principal Product.
24. ChemInform Abstract: Sulfur‐Mediated Five‐Membered Ring Expansions. Steroidal Examples.
25. A Convenient Procedure for the Preparation of Oxime Chloroformates.
26. Lanostane-to-cucurbitane transformation.
27. Internal Substitution of 5α-Lanostane on C-5, C-6, and C-8.
28. Synthetic Pathways to 2,2-Dimethyl-6-oxo-1-cyclohexaneacetic Acid, a Useful Isoprenoid Building Block
29. THE PREPARATION OF Δ STEROIDS. AN IMPROVED PROCEDURE.
30. Unusual ozonolysis of cholesteryl and androst-5-en-3β-yl acetates in the presence of primary amines. Formation of A-nor-3(5→6α)abeo-6β(H)-5-oxo-steroids, confirmed by X-ray analysis
31. ChemInform Abstract: SPIRO-THIAZOLIDINONES PART 1, PREPARATION AND STEREOCHEMISTRY OF STEROIDAL SPIRO-2′-THIAZOLIDINONES-4′
32. ChemInform Abstract: TETRACYCLIC TRITERPENES. III. BORON TRIFLUORIDE-CATALYZED REARRANGEMENTS OF 9α,11α-EPOXYLANOSTANE MODIFIED IN RING B
33. Synthesis of 19/10→9β/abeo-10α-lanost-5-enes
34. ChemInform Abstract: Spiro Steroids via the Barbier-Grignard Reaction of Steroidal Ketones with Allyl Bromide and Magnesium.
35. ChemInform Abstract: EPOXIDATION OF LANOST‐9(11)‐ENES. THE EFFECT OF A β‐CARBONYL GROUP UPON THE STEREOCHEMISTRY OF EPOXIDATION
36. ChemInform Abstract: Stereospecific Reduction of 7-Oxo Group in 3β-Acetoxycholest-5-en-7-one.
37. ChemInform Abstract: TETRACYCLIC TRITERPENES. PART 7. CIRCULAR DICHROISM OF SOME STEROID AND TRITERPENOID 5-EN-7-ONES; CONFORMATIONAL ASPECTS
38. ChemInform Abstract: INTERNAL SUBSTITUTION OF 5ALPHA-LANOSTANE ON C-5, C-6, AND C-8
39. ChemInform Abstract: SPIRO‐THIAZOLIDINONES PART 2, 3′‐SUBSTITUTED SPIRO‐2′‐THIAZOLIDINONES‐4′, DERIVATIVES OF CYCLOHEXANONE AND 5ALPHA‐CHOLESTAN‐3‐ONE
40. ChemInform Abstract: SPIRO‐THIAZOLIDINONES PART 4, ISOMERIZATIONS OF SPIRO‐2‐THIAZOLIDIN‐4‐ONES
41. ChemInform Abstract: Steroidal Cyclobutanones.
42. ChemInform Abstract: REACTION OF SOME TRISUBSTITUTED STEROID EPOXIDES WITH TRIPHENYLPHOSPHINE‐IODINE COMPLEX. DEOXYGENATION OF EPOXIDES
43. ChemInform Abstract: TETRACYCLIC TRITERPENES. PART 5. THE SYNTHESIS OF EPIMERIC 9,11‐EPOXIDES IN THE TRI‐, HEXA‐, AND OCTA‐NORLANOSTANE SERIES
44. ChemInform Abstract: Tetracyclic Triterpenes. Part 10. Solvent Effect in Reactions of Tetrasubstituted Triterpenoidal Olefins with Ozone. An Allylic Oxidation.
45. ChemInform Abstract: SYNTHESIS OF 19(10→9β)‐ABEO‐10α‐LANOST‐5‐ENES
46. ChemInform Abstract: TETRACYCLIC TRITERPENES. IV. REARRANGEMENTS OF 9α,11α-EPOXYLANOSTANES. AN EFFICIENT ENTRY OF 11-FUNCTIONALIZED PROTOST-13(17)-ENES
47. ChemInform Abstract: TETRACYCLIC TRITERPENES. PART IX. A NEW CONVERSION OF LANOSTEROL TO LANOST‐9(11)‐EN‐7‐ONE
48. ChemInform Abstract: SPIRO‐THIAZOLIDINONES PART 3, STUDIES ON THE IR AND PMR SPECTRA OF SPIRO‐THIAZOLIDINONES‐4
49. ChemInform Abstract: TETRACYCLIC TRITERPENES. PART 2. A SYNTHETIC APPROACH TO CUCURBITACINS
50. Unusual Ozonolysis of Cholesteryl and Androst-5-en-3β-yl Acetates in the Presence of Primary Amines. Formation of A-Nor-3(5→6α)abeo-6β(H)-5-oxo-steroids, Confirmed by X-Ray Analysis.
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