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30.3.1.1.1.4 Variation 4: With Solid Acid Catalysts

DOI: 10.1055/sos-SD-030-00101

Takeda, T.; Tsubouchi, A., Science of Synthesis, (2007) 30, 128.

Solid acid catalysts such as zeolite, montmorillonite, and bentonite can be used for the transformation of aldehydes and ketones into dithioacetals ‌1‌ using thiols (‌Table 4‌).[‌52‌–‌55‌] The reactions are generally carried out under heterogeneous conditions and the catalysts can be separated easily from the products simply by filtration.

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Meeeeeee Meeeeeeeee Meeeeeeeeeee Meeee (%) Mee
eeeeeeeeeeeeeee MMM 88 e·eee−8, eeeeeee, eeeeee M8 = M8 = M; M8 = Me 88 [‌88‌]
eeeeeeeeeeeeeee MMM 88 e·eee−8, eeeeeee, eeeeee M8 = M; M8 = M8 = Me 88 [‌88‌]
eeeeeeee eeeeeeee 88 e·eee−8, eeeeeee, eeeeee M8 = M; M8 = MM8M8 (M = 8-Me, 8-MMe, 8-Me, 8-MM8), eeeeeeee; M8 = Me 88–88 [‌88‌]
MM eeeeeee MM8Me8, eeeeee, 8 e M8 = M; M8 = Me; M8 = Me 88 [‌88‌]
MM eeeeeee MM8Me8, eeeeee, 8 e M8 = M; M8 = 8-eeeee; M8 = Me 88 [‌88‌]
MM eeeeeee eeeeee, eeeeee, 88 e M8 = Me; M8 = Me; M8 = Me 88 [‌88‌]
MM eeeeeee MM8Me8, eeeeee, 8 e M8,M8 = (MM8)8; M8 = Me 88 [‌88‌]
M-eeeeeeeee eeeeeee MM8Me8, eeeeee, 8 e M8 = M; M8 = Me; M8 = Me 88 [‌88‌]
M-eeeeeeeee eeeeeee MM8Me8, eeeeee, 8 e M8 = M; M8 = 8-eeeee; M8 = Me 88 [‌88‌]
M-eeeeeeeee eeeeeee eeeeee, eeeeee, 88 e M8 = Me; M8 = Me; M8 = Me 88 [‌88‌]
M-eeeeeeeee eeeeeee MM8Me8, eeeeee, 8 e M8,M8 = (MM8)8; M8 = Me 88 [‌88‌]
eeeeeeeeee eeee eeeeeee, eeeeee, 8 e M8 = M; M8 = 8-MeM8M8, 8,8-(MMM8M)M8M8; M8 = Me, Me 88–88 [‌88‌]

Meeeeeeeeeee Meeeeeeee

Meeeeee Meeeeeeeeeeee ‌8‌; Meeeeee Meeeeeeee:[‌88‌]

Me e eeee ee eee eeeeeeee eeeeeeee (88 eeee) ee MM8Me8 ee eeeeee eee eeeee MM ee M-eeeeeeeee eeeeeee (8.8 ee 8.8 eeeee ee eeeeee eeee eeeeeee ee eee eeeeeeee eeeeeeee) eee MeMM (88 eeee). Mee eeeeeee eee eeeeeeee eee 8–88 e ee, eeee MM8Me8 eee eeee ee eee eeeeeee, eeeeee ee 88°M. Mee eeeeeeee eee eeeeeeeee ee MMM. Meeee eee eeeeeeee eee eeeeeeee, eee eeeeeee eee eeeeeeee eee eee eee eeeeeeee eee eeeeeee eeee eeeeee ee MM8Me8 (88 eM). Mee eeeeeee eeeee eee eeeeee eeee 88% MeMM (8 × 88 eM), M8M, eee eeeee eee eeee eeeee (Me8MM8). Mee eeeeeee eee eeeeeee eeeee eeeeeee eeeeeeee ee eeeeee eee eeeeee eeee eeeeeee, eeeee eeeee ee eeeeeeee eeeeeee ee eeeeeeeeeeeeee, eeeeeeeeeeeeeeeee, ee eeeeeeeeeeee; eeeee: 88–88%.

References

[52] Meeeee, M.; Meeeeeee, M., Meeee. Meeeee., (8888) 88, 88.
[53] Meeeeee, M. M.; Meeeeee, M. M., Meeeeee. Meee., (8888) 888, 8888.
[54] Meeee, M.; Meeee, M. M.; Meeee, M. M.; Meeeee, M., Meeeeeeee, (8888), 88.
[55] Meeeeee, M.; Meeeee, M.; Meeeeñe, M.; Meeeeee, M.; Áeeeeee, M.; Meeeee, M., Meeee. Meeeee., (8888) 88, 8888.

Meeeeee Meeeeeeeeee

  • 8.Meeeee-Meee, (8888) M 88e8, 88.
  • 8.Meeeee-Meee, (8888) M 88e8, 888.
  • 8.Meeeee-Meee, (8888) M 88e8, 888.

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