Synthesis of Polysubstituted Ferrocenesulfoxides
Abstract
:1. Introduction
2. Results and Discussion
2.1. In Search of an Effective Protecting Group to Functionalize the Unfavorable Position Adjacent to the Sulfoxide
2.2. Attempts to Apply the “Halogen Dance” Reaction to the Ferrocenesulfoxide Series
2.3. On the Way to Polysubstituted Ferrocenesulfoxides
2.4. Specific Solid-State Structures of Some Ferrocenesulfoxides
3. Materials and Methods
3.1. General Information
3.2. Crystallography
3.3. Safety Considerations
3.4. Starting Materials
3.4.1. (tert-Butylthio)ferrocene
3.4.2. Racemic S-tert-Butylferrocenesulfoxide (rac-FcSOtBu)
3.4.3. (4-Tolylthio)ferrocene
3.4.4. Racemic S-(4-Tolyl)ferrocenesulfoxide (rac-FcSO-p-Tol)
3.5. General Procedure A: Deprotolithiation of S-tert-Butylferrocenesulfoxides Using nBuLi Followed by Electrophilic Trapping
3.5.1. (S,SP)-S-tert-Butyl-2-(trimethylsilyl)ferrocenesulfoxide (S,SP-1a)
3.5.2. (R,RP)-S-tert-Butyl-2-(trimethylsilyl)ferrocenesulfoxide (R,RP-1a)
3.5.3. (R,RP)- and (S,SP)-S-tert-Butyl-2-(trimethylsilyl)ferrocenesulfoxide (R,RP/S,SP-1a)
3.5.4. (S,RP)-S-tert-Butyl-2-iodoferrocenesulfoxide (S,RP-1b)
3.5.5. (S,RP)- and (R,SP)-S-tert-Butyl-2-iodoferrocenesulfoxide (S,RP/R,SP-1b)
3.5.6. (S,SP)-S-tert-Butyl-2-deuterioferrocenesulfoxide (S,SP-1c)
3.5.7. (S,SP)-S-tert-Butyl-2-methylferrocenesulfoxide (S,SP-1d)
3.5.8. (S)-S-tert-Butyl-2,5-bis(trimethylsilyl)ferrocenesulfoxide (S-2aa)
3.5.9. (R)- and (S)-S-tert-Butyl-2,5-bis(trimethylsilyl)ferrocenesulfoxide (rac-2aa)
3.5.10. (S,SP)-S-tert-Butyl-2-deuterio-5-(trimethylsilyl)ferrocenesulfoxide (S,SP-2ac)
3.5.11. (S,SP)-S-tert-Butyl-2-iodo-5-(trimethylsilyl)ferrocenesulfoxide (S,SP-2ab)
3.5.12. (R,RP)-S-tert-Butyl-2-iodo-5-(trimethylsilyl)ferrocenesulfoxide (R,RP-2ab)
3.5.13. (S,SP)-S-tert-Butyl-2-(diphenylphosphinyl)-5-iodoferrocenesulfoxide (S,SP-2eb)
3.5.14. (S,RP)-2-Bromo-S-tert-butyl-5-(trimethylsilyl)ferrocenesulfoxide (S,RP-2ja)
3.5.15. (S,RP)-S-tert-Butyl-2-iodo-5-(trimethylsilyl)ferrocenesulfoxide (S,RP-2ba)
3.6. General Procedure B: Deprotolithiation of Enantiopure S-tert-Butylferrocenesulfoxides Using tBuLi Followed by Electrophilic Trapping
3.6.1. (S,SP)-S-tert-Butyl-2-(diphenylphosphino)ferrocenesulfoxide (S,SP-1e)
3.6.2. (S,RP)-S-tert-Butyl-2-(tributylstannyl)ferrocenesulfoxide (S,RP-1f)
3.6.3. (S,SP)-S-tert-Butyl-2-[(α,α-diphenyl)hydroxymethyl]-5-(trimethylsilyl)ferrocenesulfoxide (S,SP-2ag)
3.7. General Procedure C: Deprotolithiation of S-tert-Butylferrocenesulfoxides Using LiTMP Followed by Electrophilic Trapping
3.7.1. (S,SP)-S-tert-Butyl-2-(diphenylphosphino)-5-(trimethylsilyl)ferrocenesulfoxide (S,SP-2ea)
3.7.2. (S,SP)-S-tert-Butyl-4-iodo-2-(trimethylsilyl)ferrocenesulfoxide (S,SP-7)
3.7.3. (S,SP)-S-tert-Butyl-2-chloro-5-fluoro-4-methyl-3-(trimethylsilyl)ferrocenesulfoxide (S,SP-12)
3.8. General Procedure D: Deprotolithiation of S-(4-tolyl)ferrocenesulfoxides Using LiTMP Followed by Electrophilic Trapping
3.8.1. (R,RP)- and (S,SP)-S-(4-Tolyl)-2-(trimethylsilyl)ferrocenesulfoxide (R,RP/S,SP-3a)
3.8.2. (R,SP)- and (S,RP)-2-Iodo-S-(4-tolyl)ferrocenesulfoxide (R,SP/S,RP-3b)
3.8.3. (S,SP)-2-Deuterio-S-(4-tolyl)ferrocenesulfoxide (S,SP-3c)
3.8.4. (R,RP)- and (S,SP)-S-(2-Iodo-4-tolyl)-2-(trimethylsilyl)ferrocenesulfoxide (R,RP/S,SP-4)
3.8.5. (R,SP)- and (S,RP)-2-Iodo-S-(4-tolyl)-5-(trimethylsilyl)ferrocenesulfoxide (R,SP/S,RP-6)
3.9. General Procedure E: One-Pot Deprotolithiation-Trimethylsilylation-Deprotolithiation-Trapping of S-tert-Butylferrocenesulfoxides
3.9.1. (S,SP)-S-tert-Butyl-2-iodoferrocenesulfoxide (S,SP-2ab)
3.9.2. (R,RP)-S-tert-Butyl-2-iodo-5-(trimethylsilyl)ferrocenesulfoxide (R,RP-2ab)
3.9.3. (S,SP)-S-tert-Butyl-2-methyl-5-(trimethylsilyl)ferrocenesulfoxide (S,SP-2ad)
3.9.4. (S,RP)-S-tert-Butyl-2-(diphenylphosphino)-5-(trimethylsilyl)ferrocenesulfoxide (S,RP-2ae)
3.9.5. (S,SP)-S-tert-Butyl-2-[(α,α-diphenyl)hydroxymethyl]-5-(trimethylsilyl)ferrocenesulfoxide (S,SP-2ag)
3.9.6. (S,SP)-S-tert-Butyl-2-(dimethylaminomethyl)-5-(trimethylsilyl)ferrocenesulfoxide (S,SP-2ah)
3.9.7. (S,SP)-S-tert-Butyl-2-fluoro-5-(trimethylsilyl)ferrocenesulfoxide (S,SP-2ai)
3.10. General Procedure F: Attempted “Halogen Dance” Using LiTMP
3.10.1. From (S,RP)-S-tert-Butyl-2-iodo-5-(trimethylsilyl)ferrocenesulfoxide (S,RP-2ba)
3.10.2. From (S,SP)-2-Bromo-S-tert-butyl-5-(trimethylsilyl)ferrocenesulfoxide (S,RP-2ja)
3.11. General Procedure G: Deprotolithiation of Enantiopure Ferrocenes using sBuLi Followed by Electrophilic Trapping
3.11.1. (S,RP)-S-tert-Butyl-2-fluoro-5-iodoferrocenesulfoxide (S,RP-2bi)
3.11.2. (S,SP)-S-tert-Butyl-2-(diphenylphosphino)-5-fluoroferrocenesulfoxide (S,SP-2ei)
3.11.3. (S,SP)-S-tert-Butyl-2-fluoro-3-iodo-5-(trimethylsilyl)ferrocenesulfoxide (S,SP-9b)
3.11.4. (S,SP)-S-tert-Butyl-2-fluoro-3-methyl-5-(trimethylsilyl)ferrocenesulfoxide (S,SP-9d)
3.11.5. (S,RP)-S-tert-Butyl-2-fluoro-5-iodo-3-methylferrocenesulfoxide (S,RP-11b)
3.11.6. (S,RP)-S-tert-Butyl-5-chloro-2-fluoro-3-methylferrocenesulfoxide (S,RP-11k)
3.12. Computational Details
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Sample Availability
References and Note
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Entry | Substrate | Method | Electrophile 1 | Product 1, Yield (%) 2 | |
---|---|---|---|---|---|
1 | S-FcSOtBu | A | ClSiMe3 | S,SP-1a, 89 | |
2 | rac-FcSOtBu | R,RP/S,SP-1a, 88 | |||
3 | S-FcSOtBu | A | I2 | S,RP-1b, 85 | |
4 | rac-FcSOtBu | R,SP/S,RP-1b, 84 | |||
5 | S-FcSOtBu | A | D2O | S,SP-1c, 98 (95% D) | |
6 | S-FcSOtBu | A | IMe | S,SP-1d, 62 | |
7 | S-FcSOtBu | B | ClPPh2 | S,SP-1e, 92 | |
8 | S-FcSOtBu | B | ClSnBu3 | S,RP-1f, 95 |
Entry | Substrate 1 (E) | Method | Electrophile 1 | Product 2, Yield (%) 2 | |
---|---|---|---|---|---|
1 | S,SP-1a (SiMe3) | A | ClSiMe3 | S-2aa, 80 | |
2 | R,RP/S,SP-1a (SiMe3) | rac-2aa, 63 | |||
3 | S,SP-1a (SiMe3) | A | I2 | S,SP-2ab, 78 | |
4 | R,RP-1a (SiMe3) | R,RP-2ab, 77 | |||
5 | S,SP-1a (SiMe3) | A | D2O | S,SP-2ac, 98 (90% D) | |
6 | S,SP-1a (SiMe3) | B | Ph2CO | S,SP-2ag, 35 3 | |
7 | S,SP-1e (PPh2) | A | I2 | S,SP-2eb, 40 4 | |
8 | S,SP-1e (PPh2) | C | ClSiMe3 | S,SP-2ea, 70 |
Entry | Substrate | n Equiv | Electrophile 1 | Product 3, Yield (%) 2 | |
---|---|---|---|---|---|
1 | rac-FcSO-p-Tol | 1.2 | ClSiMe3 | R,RP/S,SP-3a, 61 | |
2 | rac-FcSO-p-Tol | 1.5 | ClSiMe3 | R,RP/S,SP-3a, 43 | |
R,RP/S,SP-3a’, 19 | |||||
3 | rac-FcSO-p-Tol | 1.1 | I2 | R,SP/S,RP-3b, 51 3 | |
4 | 1.5 | R,SP/S,RP-3b, 81 | |||
5 | S-FcSO-p-Tol | 2 | DCl/D2O | S,SP-3c, quant. (80% D) |
Entry | Substrate | Electrophile 1 | Product 2, Yield (%) 2 | |
---|---|---|---|---|
1 | S-FcSOtBu | I2 | S,SP-2ab, 83 3 | |
2 | R-FcSOtBu | R,RP-2ab, 53 | ||
3 | S-FcSOtBu | IMe | S,SP-2ad, 74 | |
4 | S-FcSOtBu | ClPPh2 | S,RP-2ae, 48 | |
5 | S-FcSOtBu | Ph2CO | S,SP-2ag, 51 | |
6 | S-FcSOtBu | CH2=NMe2I | S,SP-2ah, 66 4 | |
7 | S-FcSOtBu | NFSI | S,SP-2ai, 67 |
Entry | Substrate 2 (E) | Product 1, Yield (%) 1 | |
---|---|---|---|
1 | R,RP-2ab (I) | R,RP-1b, 83 | |
2 | S,SP-2ac (D) | S,RP-1c, 60 | |
3 | S,SP-2ad (Me) | S,RP-1d, quant. | |
4 | S,SP-2ah (CH2NMe2) | S,RP-1h, quant. | |
5 | S,SP-2ai (F) | S,RP-1i, quant. | |
6 2 | S-2aa (SiMe3) | S,SP-1a, 78 | |
7 2 | rac-2aa (SiMe3) | S,SP/R,RP-1a, 67 |
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Wen, M.; Erb, W.; Mongin, F.; Halauko, Y.S.; Ivashkevich, O.A.; Matulis, V.E.; Roisnel, T. Synthesis of Polysubstituted Ferrocenesulfoxides. Molecules 2022, 27, 1798. https://doi.org/10.3390/molecules27061798
Wen M, Erb W, Mongin F, Halauko YS, Ivashkevich OA, Matulis VE, Roisnel T. Synthesis of Polysubstituted Ferrocenesulfoxides. Molecules. 2022; 27(6):1798. https://doi.org/10.3390/molecules27061798
Chicago/Turabian StyleWen, Min, William Erb, Florence Mongin, Yury S. Halauko, Oleg A. Ivashkevich, Vadim E. Matulis, and Thierry Roisnel. 2022. "Synthesis of Polysubstituted Ferrocenesulfoxides" Molecules 27, no. 6: 1798. https://doi.org/10.3390/molecules27061798